My First Animation

Ready for some animation? It’s quite easy: just listen for the ENTER_FRAME event sent by the “stage” (the object representing the canvas on which all graphics are drawn) as follows:

package {
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.display.Stage;
    public class HelloWorld extends Sprite {
        private var size:int = 40;
        public function HelloWorld( ) {
            stage.addEventListener( Event.ENTER_FRAME, onRender );
        }
        private function onRender( event:Event ):void {
            graphics.beginFill( 0xFFCC00 );
            graphics.drawCircle( 40, 40, size );
            size += 10;
        }
    }
}

Check out the Stage documentation for how to set the framerate and such.