FlashTest

/**
 * Copyright MMMMMonchi ( http://wonderfl.net/user/MMMMMonchi )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/tt5P
 */

package {
    import flash.display.Sprite;
	import flash.events.Event;
    public class FlashTest extends Sprite {
		private var ball:Sprite;
		private var vx:int = 15;
		private var vy:int = 21;
		
        public function FlashTest() {
            ball = new Sprite();
			ball.graphics.beginFill(0x00ff00);
			ball.graphics.drawCircle(100,100,100);
			ball.graphics.endFill();
			addChild(ball);
			ball.addEventListener(Event.ENTER_FRAME,onEnterFrame);
        }
		//エンターフレイムイベントによって呼ばれるメソッド
		private function onEnterFrame(e:Event ):void {
			ball.x += vx;
			ball.y += vy;
			if(ball.x<0||ball.x>stage.width){vx=-vx}
			if(ball.y<0||ball.y>stage.height){vy=-vy}
		}
    }	
}