private var state:Number = 0;
    private var max:Number = 4;
    
    private function next():void {
    state+=1;
    if (state >= max) state = 0;
    stack.selectedIndex = state;
    //if (state == 2) attach();
    }
  
     private var offsetU : Number = 0;
       private var offsetV : Number = 0;
        private var easeX : Number = 0;
        private var easeY : Number = 0;