[BitmapData]クローンをひたすらAddする

/**
 * Copyright stenpel ( http://wonderfl.net/user/stenpel )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/6pIm
 */

// ひたすらBitmapを貼りつけるだけのカススクリプト☆
package {
    import flash.display.Sprite;
    import flash.display.SpreadMethod;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.events.*;
    
    public class FlashTest extends Sprite {
        private var sprite:Sprite;
        private var bms:Vector.<Bitmap>;
        
        public function FlashTest() {
            // write as3 code here..
           bms = new Vector.<Bitmap>(); 
           
            sprite = new Sprite();
            sprite.graphics.beginFill(0xFF3399);
            sprite.graphics.drawRect(0,0,10,10);
            
            var bmd:BitmapData = new BitmapData(sprite.width,sprite.height, true);
            bmd.draw(sprite);
            var bm:Bitmap = new Bitmap(bmd);
            bm.addEventListener(Event.ENTER_FRAME, onEnterFrame);
            addChild(bm);
        }
        
        private function onEnterFrame(e:Event):void {
            var bm:Bitmap = e.currentTarget as Bitmap;
            var nbm:Bitmap = new Bitmap(bm.bitmapData.clone());
            nbm.blendMode = "invert";
            addChild(nbm);
            bms.push(nbm);
            nbm.x = Math.random() * stage.stageWidth;
            nbm.y = Math.random() * stage.stageHeight;
            if(bms.length > 200) {
                var bmBig:Bitmap = bms[Math.ceil(bms.length * Math.random())];
                bmBig.scaleX += 2;
                bmBig.scaleY += 2;
                //bmBig.blendMode = "";
            }
        }
    }
}