private GreenfootImage image1=new GreenfootImage("car1.png");
private GreenfootImage image2=new GreenfootImage("car2.png");
public void act ()
{
if (Greenfoot.isKeyDown ("up") && getImage ()==image1) {setLocation (getX()+1, getY());}
if (Greenfoot.isKeyDown("left") && getImage()==image1) {setImage (image2);}
}
