diff --git a/examples/webgl_demo/worker.js b/examples/webgl_demo/worker.js
index 0673dc59f..0b9f5897c 100644
--- a/examples/webgl_demo/worker.js
+++ b/examples/webgl_demo/worker.js
@@ -107,7 +107,6 @@ function timeToRestart() { // restart if at least one is inactive - the scene is
 }
 
 var meanDt = 0;
-var counter = 0;
 
 function simulate(dt) {
   dt = dt || 1;
@@ -131,18 +130,18 @@ function simulate(dt) {
     data.objects[i] = object;
   }
 
-  if (counter % 2 == 0) postMessage(data);
+  postMessage(data);
 
   if (timeToRestart()) resetPositions();
-
-  counter++;
 }
 
+
 var last = Date.now();
-while (1) {
+function mainLoop() {
   var now = Date.now();
   simulate(now - last);
   last = now;
-  while (Date.now() - now < 1000/60) {} // throttle to 60fps TODO FIXME XXX
 }
 
+setInterval(mainLoop, 1000/60);
+