build_map_objects(&world, foo, 3, 1 + rrand() % 3);
foo = build_map_objects(&world, &world.item, 4, 1 + rrand() % 3);
build_map_objects(&world, foo, 5, 1 + rrand() % 3);
build_map_objects(&world, foo, 3, 1 + rrand() % 3);
foo = build_map_objects(&world, &world.item, 4, 1 + rrand() % 3);
build_map_objects(&world, foo, 5, 1 + rrand() % 3);