anchor.diff:      pivotX = bitmapData.width / 2;
       pivotY = bitmapData.height / 2;
     }
  -  
  +
     /**
      * Sprite will be added to the stage and to the juggler if the sprite is moveable.
      */
  
positive.code:    * Removes the sprite from the stage and juggler.
     */
    removeFromStage() {
      alive=false;
      _context.game.stage.removeChild(this);
      if (isMoveAble) {
        _context.game.stage.juggler.remove(this);
      }
    }
  
  }
  
negative.code:    * * isMoveAble: will the sprite move?
     * 
     * */
    Sprite(State stateContext, String resourceName, {bool addToStage: true, bool
        isMoveAble: true}) : super(stateContext.game.resourceManager.getBitmapData(
        resourceName)) {
      this.isMoveAble = isMoveAble;
      _context = stateContext;
      if (addToStage) {
  