draw_set_alpha(draw_alpha)
draw_set_color(c_black)
draw_rectangle(0, 0, room_width, room_height, false)
draw_set_alpha(1)
draw_set_alpha(draw_alpha_white)
draw_set_color(c_white)
draw_rectangle(0, 0, room_width, room_height, false)
draw_set_alpha(1)