protected void turnRight() {

        if (moveDirection == UP) {
            moveDirection = RIGHT;
            checkDirection = UP;
        }
        else if (moveDirection == RIGHT) {
            moveDirection = DOWN;
            checkDirection = RIGHT;
        }
        else if (moveDirection == DOWN) {
            moveDirection = LEFT;
            checkDirection = DOWN;
        }
        else if (moveDirection == LEFT) {
            moveDirection = UP;
            checkDirection = LEFT;
        }

        //PApplet.println("turnRight");
        //printDirection();


    }