if (global.debug == 1)
{
    if (keyboard_check_pressed(ord("U")))
        turns -= 1;
    if (keyboard_check_pressed(ord("I")))
        turns += 1;
}
if (trcon >= 3)
{
    if (instance_exists(obj_screenwhiter))
        depth = obj_screenwhiter.depth + 2;
    draw_set_color(c_black);
    ossafe_fill_rectangle(-100, -100, 800, 800);
}