Task3

import stanford.karel.*;

public class Task3 extends Karel{

    private void fixColumn(){

        turnLeft();

        do{
            if(noBeepersPresent()){
                putBeeper();
            }
            if(frontIsClear()){
                move();

            }
        } while (noBeepersPresent() || frontIsClear());

        turnLeft();
        turnLeft();

        while(frontIsClear()){
            move();
        }

        turnLeft();
    }

    public void run(){
        fixColumn();

        while(frontIsClear()){

            for (int i=0;i<4;i++){
                move();
            }

            fixColumn();
        }

    }
}