public class ShotInterfere extends Actor
{
    GifImage explosion = new GifImage("Steam-Explosion.gif");
    GreenfootImage imageOne;
    boolean notImageOne;
    public ShotInterfere()
    {
        List <GreenfootImage> images = explosion.getImages();
        imageOne = images.get(0);
        for(GreenfootImage img: images) 
        {
            img.scale(75, 75);
        }
        setImage(explosion.getCurrentImage());
    }
    public void act() 
    {
        setImage(explosion.getCurrentImage());
        if((getImage() != imageOne) != notImageOne)
        {
            notImageOne = !notImageOne;
            if(!notImageOne)
            {
                getWorld().removeObject(this);
            }
        }
    }    
}