private var picBMP:Bitmap = new picClass()

private var picBMD:BitmapData =  picBMP.bitmapData

 

private const redCT:ColorTransform = new ColorTransform(1, 1, 1, 1, 255, 0, 0, 0);

private const unRedCT:ColorTransform = new ColorTransform(1, 1, 1, 1, -255, 0, 0,0);

 

private var i:int = 0

 

public function Main():void {

        addChild(picBMP)

        addEventListener(Event.ENTER_FRAME, tick)

}

 

private function tick(e:Event):void {

        if (i % 2)

                picBMD.colorTransform(picBMD.rect, redCT)

        else

                picBMD.colorTransform(picBMD.rect,unRedCT)

        i++        

}

picBMP.transform.colorTransform = redCT;

picBMP.transform.colorTransform = new ColorTransform();