siner += 1;
draw_set_color(c_black);
maximum = room_height / 40;
draw_set_alpha(0.3 + (sin(siner / 15) * 0.1));
ossafe_fill_rectangle(-10, -10, room_width + 10, room_height + 10);
for (i = 0; i < maximum; i += 1)
{
    draw_set_alpha(i / maximum);
    ossafe_fill_rectangle(-10, i * 40, room_width + 10, (i * 40) + 40);
}
draw_set_alpha(1);