diff --git a/main.ml b/main.ml
index 67ae643..ce5cc42 100644
--- a/main.ml
+++ b/main.ml
@@ -417,11 +417,10 @@ module Display = struct
   (* the box2 here is cannonically the place the returner drew
      (the Wall.image extents) *)
   type image = box2 * Wall.image
-  type pane = (state -> state * image) Lwt.t
+  type pane = state -> state * image
 
-  let pane_empty =
-    Lwt.return (fun s ->
-        (s, (Box2.of_pts (Box2.o s.box) (Box2.o s.box), Image.empty)) )
+  let pane_empty s =
+    (s, (Box2.of_pts (Box2.o s.box) (Box2.o s.box), Image.empty))
 
   type frame =
     { sdl_win: Sdl.window
@@ -484,7 +483,7 @@ module Display = struct
   let draw_pane frame pane =
     let width, height = Sdl.gl_get_drawable_size frame.sdl_win in
     let _, (_, image) =
-      (Lwt_main.run pane)
+      pane
         { box= Box2.v (P2.v 0. 0.) (P2.v (float width) (float height))
         ; time= ticks ()
         ; wall= frame.wall } in
@@ -639,7 +638,7 @@ module Display = struct
       List.fold_left
         (fun (sp, (bp, ip)) (pane : pane) ->
           (* uses br to hold max extent of boxes *)
-          let sr, (br, ir) = pane (sp in
+          let sr, (br, ir) = pane sp in
           (* draw the pane *)
           let _, (_, irb) = path_box Color.blue br sr in
           (* draw the box around the pane *)