diff --git a/website/canvas/event-propagators-with-device-gravity.html b/website/canvas/event-propagators-with-device-gravity.html
index d95bd23..362c811 100644
--- a/website/canvas/event-propagators-with-device-gravity.html
+++ b/website/canvas/event-propagators-with-device-gravity.html
@@ -68,7 +68,7 @@ rotation: from.x"
             // ropes.forEach(rope => { rope.gravity = { x: 0, y: 0} })
       }
 
-      async function enableGravity() {
+      window.enableGravity = async function enableGravity() {
         if (DeviceOrientationEvent.requestPermission) {
           const permission = await DeviceOrientationEvent.requestPermission();