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);