# File default/adder.rb, line 103
    def add_column()
        move()
        while next_to_a_beeper?() 
            pick_beeper()
            if not next_to_a_beeper?() 
                move()
            end
        end
        turn_around()
        while front_is_clear?() 
            move()
        end
        turn_around()
        empty_bag()
        while @check.enough_to_carry?()
            @carry.carry_one()
        end
    end