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];       
              }