package {
 import flash.display.Sprite;
 import flash.events.Event;
 
 public class animation_ch02_FirstAnimation extends Sprite {
  private var ball:Sprite;

  public function animation_ch02_FirstAnimation() {
   init();
  }
//@ init(s)
  private function init():void {
   ball = new Sprite();
   addChild(ball);
   ball.graphics.beginFill(0xff0000);
   ball.graphics.drawCircle(0, 0, 40);
   ball.x = 20;
   ball.y = stage.stageHeight / 2;
   ball.addEventListener(Event.ENTER_FRAME, onEnterFrame);          
  }
//@ frame(s)
  private function onEnterFrame(event:Event):void {
   ball.x++;
  }
 }
}