function start() {
    //It's way too complicated to explain now...
    cleanRowA();
}


function checkBall(){
    if(ballsPresent()){
        takeBall();
    }
}

function cleanRowA(){
    while(frontIsClear()){
        checkBall();
        move();
    }
    checkCorner();
}

function cleanRowB(){
    while(frontIsClear()){
        checkBall();
        move();
    }
    checkCorner2();
}

function checkCorner(){
    turnLeft();
    if(frontIsClear()){
        checkBall();
        move();
        checkBall();
        turnLeft();
        cleanRowB();
    }
    checkBall();
}

function checkCorner2(){
    turnRight();
    if(frontIsClear()){
        checkBall();
        move();
        checkBall();
        turnRight();
        cleanRowA();
    }
}