【練習】クラスの練習

/**
 * Copyright Tamanegi_kenshi ( http://wonderfl.net/user/Tamanegi_kenshi )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/7FgY
 */

package{
	import flash.display.Sprite;
	import flash.events.Event;
	
	public class Chain extends Sprite{
		private var ball:Ball;
		
		public function Chain(){
			init();
			}
			private function init():void{
				ball=new Ball(0x000000);
				addChild(ball);
				addEventListener(Event.ENTER_FRAME,on);
					}
					private function on(event:Event):void{
						ball.on2();
						}			
}
}


import flash.display.Sprite;
import flash.events.Event;



 class Ball extends Sprite{
 	private var a:Number;
	
	
	public function Ball(b:Number):void{
	   this.a =b;
	   init();
	}
	private function init():void{
	   graphics.beginFill(a);
	   graphics.drawCircle(0,0,10);
	   graphics.endFill();
	  
	   }
	 public function on2():void{
	   	this.x +=5;
	   	this.y +=5;
	   	}	
	}