复制多个loader

package flash023{
    import flash.display.Loader;
        import flash.display.MovieClip;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.filters.ConvolutionFilter;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
        import flash.net.URLLoaderDataFormat;
        import flash.utils.ByteArray;
    /**
    * ...
    * @author FLASH023
    */
    public class Main extends Sprite{
        private var loader:URLLoader;
                private var load_num:uint;
        public function Main():void{
            loadSWFBa("swf/as3.swf");
        }
        private function loadSWFBa(_path:String ):void{
            loader = new URLLoader;
                        loader.dataFormat=URLLoaderDataFormat.BINARY ;
            loader.addEventListener (Event.COMPLETE , baComplete);
            loader.load(new URLRequest (_path));
        }
        private function baComplete(_evt:Event):void {
                        var _ba:ByteArray = _evt.target.data as ByteArray;
                        var _total:uint = 4;//复制四个
                        while(_total--){
                                var _loader:Loader = new Loader;
                                _loader.loadBytes (_ba);
                                _loader.contentLoaderInfo.addEventListener (Event.COMPLETE, loadComplete);
                        }
            //-------------------
            loader.removeEventListener (Event.COMPLETE , baComplete);
            loader = null;
        }
                private function loadComplete(_evt:Event):void {
                        var _mc:MovieClip = _evt.target.content as MovieClip;
                        _mc.x = load_num % 2 * 300;
                        _mc.y = uint(load_num / 2) * 220;
                        load_num++;
                        addChild (_mc);
                }
    }
}