ENTER_FRAME Event Listener

Start the moveBall Function

Let's start that moveBall function. Copy and Paste the new statement to your Actions window:

var ball1:ball = new ball();
ball1.x=100;
ball1.y=150;
addChild(ball1);
addEventListener(Event.ENTER_FRAME,moveBall);
function moveBall(event:Event){

Notice that Event matches up in the addEventListener statement and the moveBall arguments:

This follows the same pattern as button events: