class program {

define turnright() {
    iterate(3) {
        turnleft();
    }
}

define search-wc() {
    while (frontIsClear) {
        move();
        if (frontIsBlocked) {
            if (leftIsClear) {
                turnleft();
            } else if (rightIsClear) {
                turnright();
            }
        }
    }
}

program() {
     search-wc();
    turnoff();
}

}