import flash.display.MovieClip;
import flash.display.Sprite;
import flash.events.Event;    
import flash.display.Stage;
import flash.display.StageAlign;
import flash.display.StageScaleMode;

public class SomePreloaderScreen extends Sprite
{
[Embed(source="loader.swf")]
       public static const mClip:Class;
       public var clip:MovieClip;

private function init():void
       {
          clip = new mClip() as MovieClip;
          addChild(clip);

var ww = stage.stageWidth;
var hh = stage.stageHeight;
           
    clip.width=ww;
    clip.height=hh;
}
}