diff --git a/Cargo.lock b/Cargo.lock
index c73f9036..762b7603 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1389,6 +1389,7 @@ name = "tek_engine"
 version = "0.2.0"
 dependencies = [
  "better-panic",
+ "clojure-reader",
  "crossterm",
  "ratatui",
 ]
diff --git a/engine/Cargo.toml b/engine/Cargo.toml
index b72a07cb..f9005149 100644
--- a/engine/Cargo.toml
+++ b/engine/Cargo.toml
@@ -7,3 +7,4 @@ version = "0.2.0"
 crossterm = "0.28.1"
 ratatui = { version = "0.29.0", features = [ "unstable-widget-ref", "underline-color" ] }
 better-panic = "0.3.0"
+clojure-reader = "0.3.0"
diff --git a/engine/src/edn.rs b/engine/src/edn.rs
new file mode 100644
index 00000000..2a84d991
--- /dev/null
+++ b/engine/src/edn.rs
@@ -0,0 +1,36 @@
+use crate::*;
+
+use std::sync::{Arc, RwLock};
+use std::collections::BTreeMap;
+
+pub use clojure_reader::edn::Edn;
+
+/// EDN parsing helper.
+#[macro_export] macro_rules! edn {
+    ($edn:ident { $($pat:pat => $expr:expr),* $(,)? }) => {
+        match $edn { $($pat => $expr),* }
+    };
+    ($edn:ident in $args:ident { $($pat:pat => $expr:expr),* $(,)? }) => {
+        for $edn in $args {
+            edn!($edn { $($pat => $expr),* })
+        }
+    };
+}
+
+pub trait FromEdn<C>: Sized {
+    const ID: &'static str;
+    fn from_edn (context: C, expr: &[Edn<'_>]) -> Usually<Self>;
+}
+
+/// Implements the [FromEdn] trait.
+#[macro_export] macro_rules! from_edn {
+    ($id:expr => |$context:tt:$Context:ty, $args:ident| -> $T:ty $body:block) => {
+        impl FromEdn<$Context> for $T {
+            const ID: &'static str = $id;
+            fn from_edn <'e> ($context: $Context, $args: &[Edn<'e>]) -> Usually<Self> {
+                $body
+            }
+        }
+    }
+}
+
diff --git a/engine/src/lib.rs b/engine/src/lib.rs
index 9a89169b..e792e371 100644
--- a/engine/src/lib.rs
+++ b/engine/src/lib.rs
@@ -4,6 +4,7 @@ mod input;  pub use self::input::*;
 mod output; pub use self::output::*;
 
 pub mod tui;
+pub mod edn;
 
 pub use std::error::Error;
 
diff --git a/layout/src/align.rs b/layout/src/align.rs
index 7135643a..919443a8 100644
--- a/layout/src/align.rs
+++ b/layout/src/align.rs
@@ -3,23 +3,23 @@ use crate::*;
 #[derive(Debug, Copy, Clone, Default)]
 pub enum Alignment { #[default] Center, X, Y, NW, N, NE, E, SE, S, SW, W }
 
-pub struct Align<E: Engine, T: Content<E>>(Alignment, T, PhantomData<E>);
+pub struct Align<T>(Alignment, T);
 
-impl<E: Engine, T: Content<E>> Align<E, T> {
-    pub fn c  (a: T) -> Self { Self(Alignment::Center, a, Default::default()) }
-    pub fn x  (a: T) -> Self { Self(Alignment::X,      a, Default::default()) }
-    pub fn y  (a: T) -> Self { Self(Alignment::Y,      a, Default::default()) }
-    pub fn n  (a: T) -> Self { Self(Alignment::N,      a, Default::default()) }
-    pub fn s  (a: T) -> Self { Self(Alignment::S,      a, Default::default()) }
-    pub fn e  (a: T) -> Self { Self(Alignment::E,      a, Default::default()) }
-    pub fn w  (a: T) -> Self { Self(Alignment::W,      a, Default::default()) }
-    pub fn nw (a: T) -> Self { Self(Alignment::NW,     a, Default::default()) }
-    pub fn sw (a: T) -> Self { Self(Alignment::SW,     a, Default::default()) }
-    pub fn ne (a: T) -> Self { Self(Alignment::NE,     a, Default::default()) }
-    pub fn se (a: T) -> Self { Self(Alignment::SE,     a, Default::default()) }
+impl<T> Align<T> {
+    pub fn c  (a: T) -> Self { Self(Alignment::Center, a) }
+    pub fn x  (a: T) -> Self { Self(Alignment::X,      a) }
+    pub fn y  (a: T) -> Self { Self(Alignment::Y,      a) }
+    pub fn n  (a: T) -> Self { Self(Alignment::N,      a) }
+    pub fn s  (a: T) -> Self { Self(Alignment::S,      a) }
+    pub fn e  (a: T) -> Self { Self(Alignment::E,      a) }
+    pub fn w  (a: T) -> Self { Self(Alignment::W,      a) }
+    pub fn nw (a: T) -> Self { Self(Alignment::NW,     a) }
+    pub fn sw (a: T) -> Self { Self(Alignment::SW,     a) }
+    pub fn ne (a: T) -> Self { Self(Alignment::NE,     a) }
+    pub fn se (a: T) -> Self { Self(Alignment::SE,     a) }
 }
 
-impl<E: Engine, T: Content<E>> Content<E> for Align<E, T> {
+impl<E: Engine, T: Content<E>> Content<E> for Align<T> {
     fn content (&self) -> impl Content<E> {
         &self.1
     }
@@ -45,52 +45,8 @@ impl<E: Engine, T: Content<E>> Content<E> for Align<E, T> {
             Y  => [it.x(), centered.y()],
         };
         [x, y, centered.w(), centered.h()].into()
-        //let [cfx, cfy, ..] = on.center();
-        //let [cmx, cmy, ..] = it.center();
-        ////let center   = |cf, cm, m|if cf >= cm { m + (cf - cm) } else { m.minus(cm - cf) };
-        //let center_x = center(cfx, cmx, it.x());
-        //let center_y = center(cfy, cmy, it.y());
-        //let east_x   = on.x() + on.w().minus(it.w());
-        //let south_y  = on.y() + on.h().minus(it.h());
-        //let [x, y] = match self.0 {
-            //Alignment::X      => [center_x, it.y(),  ],
-            //Alignment::Y      => [it.x(),   center_y,],
-
-            //Alignment::NW     => [on.x(),   on.y(),  ],
-            //Alignment::N      => [center_x, on.y(),  ],
-            //Alignment::NE     => [east_x,   on.y(),  ],
-            //Alignment::E      => [east_x,   center_y,],
-            //Alignment::SE     => [east_x,   south_y, ],
-            //Alignment::S      => [center_x, south_y, ],
-            //Alignment::SW     => [on.x(),   south_y, ],
-            //Alignment::W      => [on.x(),   center_y,],
-        //};
-        //[x, y, it.w(), it.h()].into()
     }
     fn render (&self, render: &mut E::Output) {
         render.place(self.layout(render.area()), &self.content())
     }
 }
-
-//fn align<E: Engine, T: Content<E>, N: Coordinate, R: Area<N> + From<[N;4]>> (align: &Align<E, T>, outer: R, content: R) -> Option<R> {
-    //if outer.w() < content.w() || outer.h() < content.h() {
-        //None
-    //} else {
-        //let [ox, oy, ow, oh] = outer.xywh();
-        //let [ix, iy, iw, ih] = content.xywh();
-        //Some(match align {
-            //Align::Center(_) => [ox + (ow - iw) / 2.into(), oy + (oh - ih) / 2.into(), iw, ih,].into(),
-            //Align::X(_)  => [ox + (ow - iw) / 2.into(), iy, iw, ih,].into(),
-            //Align::Y(_)  => [ix, oy + (oh - ih) / 2.into(), iw, ih,].into(),
-            //Align::NW(_) => [ox, oy, iw, ih,].into(),
-            //Align::N(_)  => [ox + (ow - iw) / 2.into(), oy, iw, ih,].into(),
-            //Align::NE(_) => [ox + ow - iw, oy, iw, ih,].into(),
-            //Align::W(_)  => [ox, oy + (oh - ih) / 2.into(), iw, ih,].into(),
-            //Align::E(_)  => [ox + ow - iw, oy + (oh - ih) / 2.into(), iw, ih,].into(),
-            //Align::SW(_) => [ox, oy + oh - ih, iw, ih,].into(),
-            //Align::S(_)  => [ox + (ow - iw) / 2.into(), oy + oh - ih, iw, ih,].into(),
-            //Align::SE(_) => [ox + ow - iw, oy + oh - ih, iw, ih,].into(),
-            //_ => unreachable!()
-        //})
-    //}
-//}
diff --git a/layout/src/direction.rs b/layout/src/direction.rs
index 8cab09c8..78f9f477 100644
--- a/layout/src/direction.rs
+++ b/layout/src/direction.rs
@@ -18,9 +18,9 @@ impl Direction {
     }
 }
 
-pub struct Bsp<E: Engine, X: Content<E>, Y: Content<E>>(Direction, X, Y, PhantomData<E>);
+pub struct Bsp<X, Y>(Direction, X, Y);
 
-impl<E: Engine, A: Content<E>, B: Content<E>> Content<E> for Bsp<E, A, B> {
+impl<E: Engine, A: Content<E>, B: Content<E>> Content<E> for Bsp<A, B> {
     fn layout (&self, outer: E::Area) -> E::Area {
         let [_, _, c] = self.areas(outer);
         c
@@ -35,26 +35,31 @@ impl<E: Engine, A: Content<E>, B: Content<E>> Content<E> for Bsp<E, A, B> {
     }
 }
 
-impl<E: Engine, A: Content<E>, B: Content<E>> Bsp<E, A, B> {
-    pub fn n (a: A, b: B) -> Self { Self(North, a, b, Default::default()) }
-    pub fn s (a: A, b: B) -> Self { Self(South, a, b, Default::default()) }
-    pub fn e (a: A, b: B) -> Self { Self(East,  a, b, Default::default()) }
-    pub fn w (a: A, b: B) -> Self { Self(West,  a, b, Default::default()) }
-    pub fn a (a: A, b: B) -> Self { Self(Above, a, b, Default::default()) }
-    pub fn b (a: A, b: B) -> Self { Self(Below, a, b, Default::default()) }
-    pub fn contents (&self) -> (&A, &B) { (&self.1, &self.2) }
-    pub fn areas (&self, outer: E::Area) -> [E::Area;3] {
+impl<A, B> Bsp<A, B> {
+    pub fn n (a: A, b: B) -> Self { Self(North, a, b) }
+    pub fn s (a: A, b: B) -> Self { Self(South, a, b) }
+    pub fn e (a: A, b: B) -> Self { Self(East,  a, b) }
+    pub fn w (a: A, b: B) -> Self { Self(West,  a, b) }
+    pub fn a (a: A, b: B) -> Self { Self(Above, a, b) }
+    pub fn b (a: A, b: B) -> Self { Self(Below, a, b) }
+}
+
+pub trait BspAreas<E: Engine, A: Content<E>, B: Content<E>> {
+    fn direction (&self) -> Direction;
+    fn contents (&self) -> (&A, &B);
+    fn areas (&self, outer: E::Area) -> [E::Area;3] {
+        let direction = self.direction();
         let [x, y, w, h] = outer.xywh();
         let (a, b) = self.contents();
         let [ax, ay, aw, ah] = a.layout(outer).xywh();
-        let [bx, by, bw, bh] = b.layout(match self.0 {
+        let [bx, by, bw, bh] = b.layout(match direction {
             Above | Below => outer,
             South => [x, y + ah, w, h.minus(ah)].into(),
             North => [x, y, w, h.minus(ah)].into(),
             East  => [x + aw, y, w.minus(aw), h].into(),
             West  => [x, y, w.minus(aw), h].into(),
         }).xywh();
-        match self.0 {
+        match direction {
             Above | Below => {
                 let x = ax.min(bx);
                 let w = (ax+aw).max(bx+bw).minus(x);
@@ -90,6 +95,11 @@ impl<E: Engine, A: Content<E>, B: Content<E>> Bsp<E, A, B> {
     }
 }
 
+impl<E: Engine, A: Content<E>, B: Content<E>> BspAreas<E, A, B> for Bsp<A, B> {
+    fn direction (&self) -> Direction { self. 0 }
+    fn contents (&self) -> (&A, &B) { (&self.1, &self.2) }
+}
+
 /// Renders multiple things on top of each other,
 #[macro_export] macro_rules! lay {
     ($($expr:expr),* $(,)?) => {{ let bsp = (); $(let bsp = Bsp::b(bsp, $expr);)*; bsp }}
diff --git a/layout/src/layout_edn.rs b/layout/src/layout_edn.rs
new file mode 100644
index 00000000..e466483e
--- /dev/null
+++ b/layout/src/layout_edn.rs
@@ -0,0 +1,47 @@
+use crate::*;
+use ::tek_engine::edn::*;
+
+macro_rules! edn_module {
+    ($name:literal = $Host:ident<$E:ident: $Engine:path> { $(
+        (defn $fn:ident
+            $(<$($G:ident: $Generic:ty),+>)?
+            $Struct:ident($($arg:ident : $Arg:ty),*))
+    )* }) => {
+        pub trait $Host<$E: Engine> {
+            pub fn read_one <'e> (edn: &[Edn<'e>]) -> impl Content<$E> {
+                if let Some(Edn::Symbol(name)) = edn.get(0) {
+                    match name {
+                        $(
+                            stringify!($fn) =>
+                        ),*
+                    }
+                } else {
+                    panic!("invalid edn")
+                }
+            }
+            $(
+
+            )*
+        }
+    };
+}
+
+//edn_module! {
+    //(host LayoutEdn<E>)
+    //(name "layout")
+
+    //(defn when <A: Content<E>>
+        //When(cond: bool, item: A))
+
+    //(defn either <A: Content<E>, B: Content<E>>
+        //Either(cond: bool, a: A, b: B))
+
+    //(defn map <
+        //A: Content<E>,
+        //B: Content<E>,
+        //I: Iterator<Item = A> + Send + Sync,
+        //F: Fn() -> I + Send + Sync,
+        //G: Fn(A, usize)->B + Send + Sync
+    //>
+        //Map(get_iterator: I, callback: G))
+//}
diff --git a/layout/src/lib.rs b/layout/src/lib.rs
index b41d9f0b..56f2a87d 100644
--- a/layout/src/lib.rs
+++ b/layout/src/lib.rs
@@ -2,6 +2,7 @@
 
 mod align;              pub use self::align::*;
 mod direction;          pub use self::direction::*;
+mod layout_edn;         pub use self::edn::*;
 mod measure;            pub use self::measure::*;
 mod ops;                pub use self::ops::*;
 mod transform_xy;       pub use self::transform_xy::*;
diff --git a/layout/src/measure.rs b/layout/src/measure.rs
index 98ccf85f..b1bdf2e1 100644
--- a/layout/src/measure.rs
+++ b/layout/src/measure.rs
@@ -65,7 +65,7 @@ impl<E: Engine> Measure<E> {
             y: Arc::new(0.into()),
         }
     }
-    pub fn of <T: Content<E>> (&self, item: T) -> Bsp<E, Fill<E, &Self>, T> {
+    pub fn of <T: Content<E>> (&self, item: T) -> Bsp<Fill<E, &Self>, T> {
         Bsp::b(Fill::xy(&self), item)
     }
 }
diff --git a/layout/src/ops.rs b/layout/src/ops.rs
index 117a77fc..06539e6b 100644
--- a/layout/src/ops.rs
+++ b/layout/src/ops.rs
@@ -1,55 +1,11 @@
 use crate::*;
 
-impl<E: Engine> Layout<E> for E {}
+/// Show an item only when a condition is true.
+pub struct When<A>(pub bool, pub A);
 
-pub trait Layout<E: Engine> {
-    /// Content `item` when `cond` is true.
-    fn when <A> (cond: bool, item: A) -> When<E, A> where
-        A: Content<E>
-    {
-        When(cond, item, Default::default())
-    }
-    /// Content `item` if `cond` is true, otherwise render `other`.
-    fn either <A, B> (cond: bool, a: A, b: B) -> Either<E, A, B> where
-        A: Content<E>,
-        B: Content<E>,
-    {
-        Either(cond, a, b, Default::default())
-    }
-    /// Maps an [Option<T>] through a callback `F`
-    fn opt <A, F, R> (option: Option<A>, cb: F) -> Opt<E, A, F, R> where
-        F: Fn(A) -> R,
-        R: Content<E>
-    {
-        Opt(option, cb, Default::default())
-    }
-    fn map <T, I, J, R, F>(iterator: J, callback: F) -> Map<E, T, I, J, R, F> where
-        E: Engine,
-        I: Iterator<Item = T> + Send + Sync,
-        J: Fn() -> I + Send + Sync,
-        R: Content<E>,
-        F: Fn(T, usize)->R + Send + Sync
-    {
-        Map(Default::default(), iterator, callback)
-    }
-    //pub fn reduce <E, T, I, R, F>(iterator: I, callback: F) -> Reduce<E, T, I, R, F> where
-        //E: Engine,
-        //I: Iterator<Item = T> + Send + Sync,
-        //R: Content<E>,
-        //F: Fn(R, T, usize) -> R + Send + Sync
-    //{
-        //Reduce(Default::default(), iterator, callback)
-    //}
-}
-
-pub struct Opt<E: Engine, A, F: Fn(A)->R, R: Content<E>>(Option<A>, F, PhantomData<E>);
-
-/// Contents `self.1` when `self.0` is true.
-pub struct When<E: Engine, A>(bool, A, PhantomData<E>);
-
-impl<E: Engine, A: Content<E>> Content<E> for When<E, A> {
+impl<E: Engine, A: Content<E>> Content<E> for When<A> {
     fn layout (&self, to: E::Area) -> E::Area {
-        let Self(cond, item, ..) = self;
+        let Self(cond, item) = self;
         let mut area = E::Area::zero();
         if *cond {
             let item_area = item.layout(to);
@@ -61,45 +17,44 @@ impl<E: Engine, A: Content<E>> Content<E> for When<E, A> {
         area.into()
     }
     fn render (&self, to: &mut E::Output) {
-        let Self(cond, item, ..) = self;
+        let Self(cond, item) = self;
         if *cond { item.render(to) }
     }
 }
 
-/// Contents `self.1` when `self.0` is true, otherwise renders `self.2`
-pub struct Either<E: Engine, A, B>(bool, A, B, PhantomData<E>);
+/// Show one item if a condition is true and another if the condition is false
+pub struct Either<A, B>(pub bool, pub A, pub B);
 
-impl<E: Engine, A: Content<E>, B: Content<E>> Content<E> for Either<E, A, B> {
+impl<E: Engine, A: Content<E>, B: Content<E>> Content<E> for Either<A, B> {
     fn layout (&self, to: E::Area) -> E::Area {
-        let Self(cond, a, b, ..) = self;
+        let Self(cond, a, b) = self;
         if *cond { a.layout(to) } else { b.layout(to) }
     }
     fn render (&self, to: &mut E::Output) {
-        let Self(cond, a, b, ..) = self;
+        let Self(cond, a, b) = self;
         if *cond { a.render(to) } else { b.render(to) }
     }
 }
 
-pub struct Map<E, T, I, J, R, F>(PhantomData<E>, J, F) where
-    E: Engine,
-    I: Iterator<Item = T> + Send + Sync,
-    J: Fn()->I + Send + Sync,
-    R: Content<E>,
-    F: Fn(T, usize)->R + Send + Sync;
+pub struct Map<A, B, I, F, G>(pub F, pub G) where
+    I: Iterator<Item = A> + Send + Sync,
+    F: Fn() -> I + Send + Sync,
+    G: Fn(A, usize)->B + Send + Sync;
 
-impl<E, T, I, J, R, F> Content<E> for Map<E, T, I, J, R, F> where
+impl<E, A, B, I, F, G> Content<E> for Map<A, B, I, F, G> where
     E: Engine,
-    I: Iterator<Item = T> + Send + Sync,
-    J: Fn()->I + Send + Sync,
-    R: Content<E>,
-    F: Fn(T, usize)->R + Send + Sync
+    B: Content<E>,
+    I: Iterator<Item = A> + Send + Sync,
+    F: Fn() -> I + Send + Sync,
+    G: Fn(A, usize)->B + Send + Sync
 {
     fn layout (&self, area: E::Area) -> E::Area {
+        let Self(get_iterator, callback) = self;
         let mut index = 0;
         let [mut min_x, mut min_y] = area.center();
         let [mut max_x, mut max_y] = area.center();
-        for item in (self.1)() {
-            let area = (self.2)(item, index).layout(area).xywh();
+        for item in get_iterator() {
+            let area = callback(item, index).layout(area).xywh();
             let [x,y,w,h] = area.xywh();
             min_x = min_x.min(x.into());
             min_y = min_y.min(y.into());
@@ -113,10 +68,11 @@ impl<E, T, I, J, R, F> Content<E> for Map<E, T, I, J, R, F> where
         area.center_xy([w.into(), h.into()].into()).into()
     }
     fn render (&self, to: &mut E::Output) {
+        let Self(get_iterator, callback) = self;
         let mut index = 0;
         //let area = self.layout(to.area());
-        for item in (self.1)() {
-            let item = (self.2)(item, index);
+        for item in get_iterator() {
+            let item = callback(item, index);
             //to.place(area.into(), &item);
             to.place(to.area().into(), &item);
             index += 1;
@@ -125,6 +81,15 @@ impl<E, T, I, J, R, F> Content<E> for Map<E, T, I, J, R, F> where
 }
 
 /*
+
+    //pub fn reduce <E, T, I, R, F>(iterator: I, callback: F) -> Reduce<E, T, I, R, F> where
+        //E: Engine,
+        //I: Iterator<Item = T> + Send + Sync,
+        //R: Content<E>,
+        //F: Fn(R, T, usize) -> R + Send + Sync
+    //{
+        //Reduce(Default::default(), iterator, callback)
+    //}
 pub struct Reduce<E, T, I, R, F>(PhantomData<(E, R)>, I, F) where
     E: Engine,
     I: Iterator<Item = T> + Send + Sync,
@@ -141,3 +106,42 @@ impl<E, T, I, R, F> Content<E> for Reduce<E, T, I, R, F> where
     }
 }
 */
+
+//macro_rules! define_ops {
+    //($Trait:ident<$E:ident:$Engine:path> { $(
+        //$(#[$attr:meta $($attr_args:tt)*])*
+        //(
+            //$fn:ident
+            //$(<$($G:ident$(:$Gen:path)?, )+>)?
+            //$Op:ident
+            //($($arg:ident:$Arg:ty),*)
+        //)
+    //)* }) => {
+        //impl<$E: $Engine> $Trait<E> for E {}
+        //pub trait $Trait<$E: $Engine> {
+            //$(
+                //$(#[$attr $($attr_args)*])*
+                //fn $fn $(<$($G),+>)?
+                //($($arg:$Arg),*)-> $Op<$($(, $G)+)?> 
+                //$(where $($G: $($Gen + Send + Sync)?),+)?
+                //{ $Op($($arg),*) }
+            //)*
+        //}
+    //}
+//}
+
+//define_ops! {
+    //Layout<E: Engine> {
+        //(when <A: Content<E>,>
+            //When(cond: bool, item: A))
+        ///// When `cond` is `true`, render `a`, otherwise render `b`.
+        //(either <A: Content<E>, B: Content<E>,>
+            //Either(cond: bool, a: A, b: B))
+        ///// If `opt` is `Some(T)` renders `cb(t)`, otherwise nothing.
+        //(opt <A, F: Fn(A) -> B, B: Content<E>,>
+            //Opt(option: Option<A>, cb: F))
+        ///// Maps items of iterator through callback.
+        //(map <A, B: Content<E>, I: Iterator<Item = A>, F: Fn() -> I, G: Fn(A, usize)->B,>
+            //Map(get_iterator: F, callback: G))
+    //}
+//}
diff --git a/src/arranger/arranger_v_clips.rs b/src/arranger/arranger_v_clips.rs
index 97520739..6dcc0d86 100644
--- a/src/arranger/arranger_v_clips.rs
+++ b/src/arranger/arranger_v_clips.rs
@@ -20,7 +20,7 @@ impl<'a> ArrangerVClips<'a> {
 impl<'a> Content<Tui> for ArrangerVClips<'a> {
     fn content (&self) -> impl Content<Tui> {
         let iter = ||self.scenes.iter().zip(self.rows.iter().map(|row|row.0));
-        let col  = Tui::map(iter, |(scene, pulses), i|Self::format_scene(self.tracks, scene, pulses));
+        let col  = Map(iter, |(scene, pulses), i|Self::format_scene(self.tracks, scene, pulses));
         Fill::xy(col)
     }
 }
@@ -37,7 +37,7 @@ impl<'a> ArrangerVClips<'a> {
         let name = Tui::fg_bg(scene.color.lightest.rgb, scene.color.base.rgb,
             Expand::x(1, Tui::bold(true, scene.name.read().unwrap().clone()))
         );
-        let clips = Tui::map(||ArrangerTrack::with_widths(tracks), move|(index, track, x1, x2), _|
+        let clips = Map(||ArrangerTrack::with_widths(tracks), move|(index, track, x1, x2), _|
             Push::x((x2 - x1) as u16, Self::format_clip(scene, index, track, (x2 - x1) as u16, height))
         );
         Fixed::y(height, row!(icon, name, clips))
diff --git a/src/arranger/arranger_v_head.rs b/src/arranger/arranger_v_head.rs
index 0a9a68a3..cfef2096 100644
--- a/src/arranger/arranger_v_head.rs
+++ b/src/arranger/arranger_v_head.rs
@@ -20,7 +20,7 @@ render!(Tui: (self: ArrangerVHead<'a>) => {
         row!(Tui::fg(color.light.rgb, "▎"), Tui::fg(color.lightest.rgb, field))
     }
     Some(Push::x(self.scenes_w,
-        Tui::map(||ArrangerTrack::with_widths(self.tracks), |(_, track, x1, x2), i| {
+        Map(||ArrangerTrack::with_widths(self.tracks), |(_, track, x1, x2), i| {
             let (w, h) = (ArrangerTrack::MIN_WIDTH.max(x2 - x1), HEADER_H);
             let color  = track.color();
             let input  = Self::format_input(track);
diff --git a/src/clock/clock_tui.rs b/src/clock/clock_tui.rs
index 5221b2bc..80d9c0c4 100644
--- a/src/clock/clock_tui.rs
+++ b/src/clock/clock_tui.rs
@@ -74,11 +74,11 @@ render!(Tui: (self: TransportView<'a>) => Outer(
 pub struct PlayPause { pub compact: bool, pub playing: bool }
 render!(Tui: (self: PlayPause) => Tui::bg(
     if self.playing{Color::Rgb(0,128,0)}else{Color::Rgb(128,64,0)},
-    Tui::either(self.compact,
-        Thunk::new(||Fixed::x(9, Tui::either(self.playing,
+    Either(self.compact,
+        Thunk::new(||Fixed::x(9, Either(self.playing,
             Tui::fg(Color::Rgb(0, 255, 0),   " PLAYING "),
             Tui::fg(Color::Rgb(255, 128, 0), " STOPPED ")))),
-        Thunk::new(||Fixed::x(5, Tui::either(self.playing,
+        Thunk::new(||Fixed::x(5, Either(self.playing,
             Tui::fg(Color::Rgb(0, 255, 0),   Bsp::s(" 🭍🭑🬽 ", " 🭞🭜🭘 ",)),
             Tui::fg(Color::Rgb(255, 128, 0), Bsp::s(" ▗▄▖ ", " ▝▀▘ ",))))))));
 
@@ -95,7 +95,7 @@ impl BeatStats {
         Self { compact, bpm: format!("{:.3}", clock.timebase.bpm.get()), beat, time }
     }
 }
-render!(Tui: (self: BeatStats) => Tui::either(self.compact,
+render!(Tui: (self: BeatStats) => Either(self.compact,
     row!(
         FieldV(TuiTheme::g(128).into(), "BPM",  &self.bpm),
         FieldV(TuiTheme::g(128).into(), "Beat", &self.beat),
@@ -124,7 +124,7 @@ impl OutputStats {
         }
     }
 }
-render!(Tui: (self: OutputStats) => Tui::either(self.compact,
+render!(Tui: (self: OutputStats) => Either(self.compact,
     row!(
         FieldV(TuiTheme::g(128).into(), "SR",  &self.sample_rate),
         FieldV(TuiTheme::g(128).into(), "Buf", &self.buffer_size),
diff --git a/src/edn.rs b/src/edn.rs
index 289d3e81..931fcdc3 100644
--- a/src/edn.rs
+++ b/src/edn.rs
@@ -1,37 +1,4 @@
 use crate::*;
-use std::sync::{Arc, RwLock};
-use std::collections::BTreeMap;
-pub use clojure_reader::edn::Edn;
-//pub use clojure_reader::{edn::{read, Edn}, error::Error as EdnError};
-
-/// EDN parsing helper.
-#[macro_export] macro_rules! edn {
-    ($edn:ident { $($pat:pat => $expr:expr),* $(,)? }) => {
-        match $edn { $($pat => $expr),* }
-    };
-    ($edn:ident in $args:ident { $($pat:pat => $expr:expr),* $(,)? }) => {
-        for $edn in $args {
-            edn!($edn { $($pat => $expr),* })
-        }
-    };
-}
-
-pub trait FromEdn<C>: Sized {
-    const ID: &'static str;
-    fn from_edn (context: C, expr: &[Edn<'_>]) -> Usually<Self>;
-}
-
-/// Implements the [FromEdn] trait.
-#[macro_export] macro_rules! from_edn {
-    ($id:expr => |$context:tt:$Context:ty, $args:ident| -> $T:ty $body:block) => {
-        impl FromEdn<$Context> for $T {
-            const ID: &'static str = $id;
-            fn from_edn <'e> ($context: $Context, $args: &[Edn<'e>]) -> Usually<Self> {
-                $body
-            }
-        }
-    }
-}
 
 from_edn!("sampler" => |jack: &Arc<RwLock<JackConnection>>, args| -> crate::Sampler {
     let mut name = String::new();
diff --git a/src/lib.rs b/src/lib.rs
index a60d3762..84d9c50b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,6 +12,7 @@ pub(crate) use ::tek_layout::{
         Output, Content, Thunk, render,
         Input, Handle, handle,
         kexp, kpat,
+        edn::*,
         tui::{
             Tui,
             TuiIn, key, ctrl, shift, alt,
diff --git a/src/midi/midi_launch.rs b/src/midi/midi_launch.rs
index 49ec833e..c196b5a4 100644
--- a/src/midi/midi_launch.rs
+++ b/src/midi/midi_launch.rs
@@ -15,12 +15,13 @@ pub trait HasPlayPhrase: HasClock {
             None
         }
     }
-    fn pulses_since_start_looped (&self) -> Option<f64> {
+    fn pulses_since_start_looped (&self) -> Option<(f64, f64)> {
         if let Some((started, Some(phrase))) = self.play_phrase().as_ref() {
             let elapsed = self.clock().playhead.pulse.get() - started.pulse.get();
             let length  = phrase.read().unwrap().length.max(1); // prevent div0 on empty phrase
+            let times   = (elapsed as usize / length) as f64;
             let elapsed = (elapsed as usize % length) as f64;
-            Some(elapsed)
+            Some((times, elapsed))
         } else {
             None
         }
diff --git a/src/pool/clip_select.rs b/src/pool/clip_select.rs
index 44a2b3d7..5d07f341 100644
--- a/src/pool/clip_select.rs
+++ b/src/pool/clip_select.rs
@@ -25,7 +25,9 @@ impl ClipSelected {
             name,
             color,
             time: state.pulses_since_start_looped()
-                .map(|elapsed|format!("+{:>}", state.clock().timebase.format_beats_0(elapsed)))
+                .map(|(times, time)|format!("{:>3}x {:>}",
+                    times+1.0,
+                    state.clock().timebase.format_beats_1(time)))
                 .unwrap_or_else(||String::from("        "))
         }
     }
@@ -44,7 +46,7 @@ impl ClipSelected {
                 let current = state.clock().playhead.pulse.get();
                 if target > current {
                     let remaining = target - current;
-                    format!("-{:>}", state.clock().timebase.format_beats_0(remaining))
+                    format!("-{:>}", state.clock().timebase.format_beats_1(remaining))
                 } else {
                     String::new()
                 }
diff --git a/src/pool/pool_tui.rs b/src/pool/pool_tui.rs
index 614cd450..4fdb8166 100644
--- a/src/pool/pool_tui.rs
+++ b/src/pool/pool_tui.rs
@@ -7,7 +7,7 @@ render!(Tui: (self: PoolView<'a>) => {
     let color = self.1.phrase().read().unwrap().color;
     Outer(
         Style::default().fg(color.dark.rgb).bg(color.darkest.rgb)
-    ).enclose(Tui::map(||model.phrases().iter(), |clip, i|{
+    ).enclose(Map(||model.phrases().iter(), |clip, i|{
         let item_height = 1;
         let item_offset = i as u16 * item_height;
         let selected    = i == model.phrase_index();
@@ -20,8 +20,8 @@ render!(Tui: (self: PoolView<'a>) => {
         offset(Tui::bg(if selected { color.light.rgb } else { color.base.rgb }, lay!(
             Align::w(Tui::fg(color.lightest.rgb, Tui::bold(selected, name))),
             Align::e(Tui::fg(color.lightest.rgb, Tui::bold(selected, length))),
-            Align::w(Tui::when(selected, Tui::bold(true, Tui::fg(TuiTheme::g(255), "▶")))),
-            Align::e(Tui::when(selected, Tui::bold(true, Tui::fg(TuiTheme::g(255), "◀")))),
+            Align::w(When(selected, Tui::bold(true, Tui::fg(TuiTheme::g(255), "▶")))),
+            Align::e(When(selected, Tui::bold(true, Tui::fg(TuiTheme::g(255), "◀")))),
         )))
     }))
 });
diff --git a/src/sampler/sample_list.rs b/src/sampler/sample_list.rs
index ad46d003..8ce01bd7 100644
--- a/src/sampler/sample_list.rs
+++ b/src/sampler/sample_list.rs
@@ -17,7 +17,7 @@ render!(Tui: (self: SampleList<'a>) => {
     let note_lo = editor.note_lo().load(Relaxed);
     let note_pt = editor.note_point();
     let note_hi = editor.note_hi();
-    Outer(Style::default().fg(TuiTheme::g(96))).enclose(Tui::map(move||(note_lo..=note_hi).rev(), move|note, i| {
+    Outer(Style::default().fg(TuiTheme::g(96))).enclose(Map(move||(note_lo..=note_hi).rev(), move|note, i| {
 
         let offset = |a|Push::y(i as u16, Align::n(Fixed::y(1, Fill::x(a))));
 
diff --git a/src/sequencer.rs b/src/sequencer.rs
index e0656c6c..3e84f468 100644
--- a/src/sequencer.rs
+++ b/src/sequencer.rs
@@ -47,38 +47,27 @@ from_jack!(|jack|SequencerTui {
         clock,
     }
 });
-render!(Tui: (self: SequencerTui) => {
-    let w =
-        self.size.w();
-    let phrase_w =
-        if w > 60 { 20 } else if w > 40 { 15 } else { 10 };
-    let color = self.player.play_phrase().as_ref().map(|(_,p)|
-        p.as_ref().map(|p|p.read().unwrap().color)
-    ).flatten().clone();
-    let toolbar = Tui::when(self.transport,
-        TransportView::new(true, &self.clock));
-    let selectors = Tui::when(self.selectors,
-        Bsp::e(ClipSelected::play_phrase(&self.player), ClipSelected::next_phrase(&self.player)));
-    let pool_w =
-        if self.pool.visible { phrase_w } else { 0 };
-    let pool =
-        Pull::y(1, Fill::y(Align::e(PoolView(self.pool.visible, &self.pool))));
-    let edit_clip =
-        MidiEditClip(&self.editor);
-    self.size.of(Bsp::s(
-        toolbar,
-        Bsp::s(
-            lay!(Align::w(edit_clip), Align::e(selectors)),
-            Bsp::n(
-                Align::x(Fixed::y(1, MidiEditStatus(&self.editor))),
-                Bsp::w(
-                    Fixed::x(pool_w, Align::e(Fill::y(PoolView(self.compact, &self.pool)))),
-                    Fill::xy(&self.editor),
-                ),
-            )
-        )
-    ))
-});
+render!(Tui: (self: SequencerTui) => self.size.of(
+    Bsp::s(self.toolbar_view(),
+    Bsp::n(self.status_view(),
+    Bsp::w(self.pool_view(), Fill::xy(&self.editor))))));
+impl SequencerTui {
+    fn toolbar_view (&self) -> impl Content<Tui> + use<'_> {
+        self.transport.then(||TransportView::new(true, &self.clock))
+    }
+    fn status_view (&self) -> impl Content<Tui> + use<'_> {
+        let edit_clip = MidiEditClip(&self.editor);
+        let selectors = When(self.selectors, Bsp::e(ClipSelected::play_phrase(&self.player), ClipSelected::next_phrase(&self.player)));
+        row!(selectors, edit_clip, MidiEditStatus(&self.editor))
+    }
+    fn pool_view (&self) -> impl Content<Tui> + use<'_> {
+        let w = self.size.w();
+        let phrase_w = if w > 60 { 20 } else if w > 40 { 15 } else { 10 };
+        let pool_w = if self.pool.visible { phrase_w } else { 0 };
+        let pool = Pull::y(1, Fill::y(Align::e(PoolView(self.pool.visible, &self.pool))));
+        Fixed::x(pool_w, Align::e(Fill::y(PoolView(self.compact, &self.pool))))
+    }
+}
 audio!(|self:SequencerTui, client, scope|{
     // Start profiling cycle
     let t0 = self.perf.get_t0();