    public static final int TURN_LEFT = 1;
    public static final int TURN_RIGHT = 2;

    public void turn(float degrees) {
	direction += degrees;
    }

    public void turn(int whichWay) {
	if (whichWay == TURN_LEFT)
	    direction += 90;
	else if (whichWay == TURN_RIGHT)
	    direction -= 90;
    }
