"draw_stairs", "change_stairs", NULL, &stairs_opts,
1000, 1, 1, 1, 4, 1.0, "",
"Shows Infinite Stairs, an Escher-like scene", 0, NULL};
"draw_stairs", "change_stairs", NULL, &stairs_opts,
1000, 1, 1, 1, 4, 1.0, "",
"Shows Infinite Stairs, an Escher-like scene", 0, NULL};