@stair = 0
	sdf -1, -1
	msg 0, -1, -1
	pic 0, 4
	ex1 43, 13, -1
	ex2 14, -1, -1
	goto -1
@set-sector = 1
	sdf -1, -1
	msg -1, -1, -1
	pic 0, 4
	ex1 0, 2, -1
	ex2 18, 40, -1
	goto -1
@set-sector = 2
	sdf -1, -1
	msg -1, -1, -1
	pic 0, 4
	ex1 1, 0, -1
	ex2 16, 5, -1
	goto -1