# File default/stair_sweeper.rb, line 24
def task()
    alex = StairSweeper.new(1, 1, EAST, 0)
    alex.set_name("Alex")
    alex.climb_stair()
    alex.pick_beeper()
    alex.climb_stair()
    alex.pick_beeper()
    alex.climb_stair()
    alex.pick_beeper()
    alex.turn_off()
    alex.display()
end