private void fire() 
    {
            addToVelocity(new Vector(getRotation(), 0.3));
            Ball4 bullet = new Ball4 ( getVelocity(), getRotation());            
            getWorld().addObject (bullet, getX(), getY()-50);                            
            bullet.setRotation(getRotation());
            bullet.move(40);
            bullet. changeig();
            Baba baba = new Baba();
            
            if (bullet.getImage().equals (Baba.class)){
                
                 getWorld().removeObject(this);
            }
             
            
           
           move(-speed);
            
        }