private function loop(e : Event) : void {
               offsetU = getTimer() * 0.0001;
               offsetV = getTimer() * 0.0002;
               
               easeX += (stage.mouseX - easeX) * .1;
               easeY += (stage.mouseY - easeY) * .1;
               
              
               shader.data.center.value = [easeX,easeY];
               shader.data.offset.value = [offsetU,offsetV]
               stack.filters = [filter];    
        }