class program
    {
    define turnright()
        {
        iterate(3)
            turnleft();
        }
    define halfturn()
        {
        turnleft();
        turnleft();
        }
    
    define colocaLinea()
        {
        putbeeper();
        while( frontIsClear )
            {
            move();
            putbeeper();
            }
    
        halfturn();
        while( nextToABeeper )
            move();
        }
    
    program()
        {
        if( anyBeepersInBeeperBag )
            {
            halfturn();
            colocaLinea();
            while( anyBeepersInBeeperBag )
                {
                turnright();
                move();
                turnright();
                colocaLinea();
                }
            }
        turnoff();
        }
    }