In app development their are many steps where we have to hang on for a while, like we are waiting for the server response, or the loading of assets or any other function to complete. Sometime to manage these such task we need a loading screen, which will appear during gap and after completion of program it will removed. So here is the code to make a loading screen.

1- We add a quad

_overlay = new Quad(Starling.current.stage.stageWidth,Starling.current.stage.stageHeight , 0x000000); 
            _overlay.alpha = 0.9;
            addChild(_overlay);

2- loading image

        loadinImage= new Image(AssetLoader.getTexture("LoadingCircle"));
        loadinImage.pivotX=loadinImage.width/2;
        loadinImage.pivotY=loadinImage.height/2;
        this.addChild(loadinImage);

        loadinImage.x=stage.stageWidth/2 - loadinImage.width/2;
        loadinImage.y=stage.stageHeight/2 - loadinImage.height /2;
        loadinImage.scaleX = Constant.SCALE;
        loadinImage.scaleY = Constant.SCALE;

        timer= new Timer(10);
        timer.addEventListener(TimerEvent.TIMER, rotate);
        timer.start();

    private function rotate(evt:TimerEvent):void
    {
        loadinImage.rotation+=.1;
    }