---

if wall_from_up() and wall_from_left():
	move_down()
	fill_cell()
	move_right()
	move_up()
	fill_cell()
	move_down()

elif wall_from_down() and wall_from_left():
	move_right()
	move_up()
	fill_cell()
	move_down()

elif wall_from_up() and wall_from_right():
	move_down()
	move_left()
	fill_cell()
	move_right()

elif wall_from_down() and wall_from_right():
	move_up()
	fill_cell()
	move_down()
	move_left()
	fill_cell()
	move_right()