public void addDropping(Dropping.TYPE type){
        if(type==null || stone)
            return;
        
        switch(type){
            case BIG_SLIDER: dropping=new BigSliderDropping(x+(width-BigSliderDropping.WIDTH)/2, y+height);
                             break;
            case SMALL_SLIDER: dropping=new SmallSliderDropping(x+(width-BigSliderDropping.WIDTH)/2, y+height);
                               break;
            case BOMB: dropping=new BombDropping(x+(width-BigSliderDropping.WIDTH)/2, y+height);
                       break;
            case SUPER_BALL: dropping=new SuperBallDropping(x+(width-BigSliderDropping.WIDTH)/2, y+height);
                             break;
            case WEAPON: dropping=new WeaponDropping(x+(width-BigSliderDropping.WIDTH)/2, y+height);
                         break;
            case LIFE: dropping=new LifeDropping(x+(width-BigSliderDropping.WIDTH)/2, y+height);
                         break;
        }
    }