diff --git a/desktop/sources/index.html b/desktop/sources/index.html
index a775c71..1b36e48 100644
--- a/desktop/sources/index.html
+++ b/desktop/sources/index.html
@@ -42,6 +42,7 @@
       ronin.controller.addRole('default', 'Edit', 'selectall')
       ronin.controller.add("default","Project","Run",() => { ronin.commander.run(); },"CmdOrCtrl+R");
       ronin.controller.add("default","Project","Reload Run",() => { ronin.source.revert(); ronin.commander.run(); },"CmdOrCtrl+Shift+R");
+      ronin.controller.add("default","Project", "Toggle Animation (experimental)",() => { ronin.commander.toggleAnimation(); },"CmdOrCtrl+Shift+T");
       ronin.controller.add("default","Commander","Toggle",() => { ronin.commander.toggle(); },"CmdOrCtrl+K");
       ronin.controller.commit();
       ronin.install(document.body);
diff --git a/desktop/sources/scripts/commander.js b/desktop/sources/scripts/commander.js
index 0ace1ff..b6b5b3d 100644
--- a/desktop/sources/scripts/commander.js
+++ b/desktop/sources/scripts/commander.js
@@ -4,6 +4,7 @@ function Commander (ronin) {
   this._input = document.createElement('textarea')
   this._status = document.createElement('div')
   this._status.id = 'status'
+  this.isAnimated = false
 
   this.install = function (host) {
     this.el.appendChild(this._input)
@@ -20,12 +21,18 @@ function Commander (ronin) {
     this.hide()
   }
 
-  this.run = function (txt = this._input.value) {
+  this.run = (txt = this._input.value) => {
     if (txt.indexOf('$') > -1) { ronin.log('Present: $'); return }
-    console.log('========')
+    !this.isAnimated && console.log('========')
     ronin.surface.maximize()
     const inter = new Lisp(txt, ronin.library)
     inter.toPixels()
+    this.isAnimated && requestAnimationFrame(() => this.run(txt))
+  }
+
+  this.toggleAnimation = () => {
+    this.isAnimated = !this.isAnimated
+    this.run(this._input.value)
   }
 
   this.load = function (txt) {
diff --git a/desktop/sources/scripts/library.js b/desktop/sources/scripts/library.js
index f3bc7fa..53f0f0d 100644
--- a/desktop/sources/scripts/library.js
+++ b/desktop/sources/scripts/library.js
@@ -253,4 +253,8 @@ function Library (ronin) {
     }
     return a === b
   }
+
+  // Livecoding
+
+  this.time = Date.now
 }
diff --git a/examples/animation.lisp b/examples/animation.lisp
new file mode 100644
index 0000000..1a7d77a
--- /dev/null
+++ b/examples/animation.lisp
@@ -0,0 +1,10 @@
+; animation
+; click Project > Toggle Animation
+
+(
+(def t (sin (div (time) 100)))
+
+(def pos (add 200 (mul 30 t)))
+(def square (lambda (a) (rect (add 200 a) a a a)))
+(stroke (square pos) 1 "red")
+)
\ No newline at end of file