Update eventContext.md

Author: DeveloperTryingToCodeLikeOtherOfThem

docs/reference/game/eventContext.md

@@ -5,5 +5,14 @@ game.eventContext();
 ```
 
 ## Returns
-the scene's eventContext, which gets the EventContext class in control.
- 
+the EventContext object for the active scene.
+
+## Example
+Manage the frame handlers for the scene and log the double the millisecond every 20 FPS.
+``` ts
+   const millis = control.millis();
+   game.eventContext().registerFrameHandler(20, () => {
+       const doubledMillis = millis * 2;
+       console.log(doubledMillis);
+   })
+```