Rotation an object（オブジェクトの回転）

/**
 * Copyright vinton ( http://wonderfl.net/user/vinton )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/3CJV
 */

package{
    import flash.display.Sprite;
    import flash.events.Event;
 
    public class Main extends Sprite{
        private var rect:Sprite;
 
        public function Main(){

            rect = new Sprite();
            rect.graphics.beginFill(0xFF0000);
            rect.graphics.drawRect(0, 0, 100, 100);           
            rect.graphics.endFill();
            rect.x = rect.y = 232.5;
            addChild(rect);
 
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
        }
 
        private function onEnterFrame(event:Event):void{
            rect.rotation += 15;
        }
    }
}