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package {     import flash.display.Sprite;     import flash.events.*;     import flash.net.*;     public class Main extends Sprite     {         private var loader:URLLoader = new URLLoader(new URLRequest("http://example.com/huge.xml"));         private var total:Sprite = new Sprite();         private var loaded:Sprite = new Sprite();              public function Main()         {             total.graphics.beginFill(0xff0000, 1);             total.graphics.drawRect(0, 0, 200, 10);             total.graphics.endFill();             addChild(total);             total.y = 200;             total.x = 100;                  addChild(loaded);             loaded.y = 200;             loaded.x = 100;                  loader.addEventListener(Event.OPEN, openListener);             loader.addEventListener(Event.COMPLETE, completeListener);             loader.addEventListener(ProgressEvent.PROGRESS, progressListener);         }              private function openListener(event:Event):void         {             trace(" opened " + loader.bytesLoaded + " but nothing loaded yet ");         }              private function completeListener(event:Event):void         {             trace(" all done loading " + loader.data + " and here's the xml file we loaded ");         }              private function progressListener(event:Event):void         {             var amount:Number = (loader.bytesLoaded / loader.bytesTotal) * 200;             loaded.graphics.clear();             loaded.graphics.beginFill(0x00ff00, 1);             loaded.graphics.drawRect(0, 0, amount, 10);             loaded.graphics.endFill();         }     } }