if (global.flag[8] == 1)
    bg_speed = 0;
if (depth == 1000)
{
    mysurface = -999;
    depth = 998;
}
if (!instance_exists(obj_thrash_intro) && !instance_exists(obj_thrash_transformation_transition))
    rectsiner += (bg_speed * f);
if (global.flag[8] == 1)
    slow_down = 1;
if (slow_down == 1)
{
    if (bg_speed > 0)
        bg_speed -= 0.03;
    if (bg_speed < 0)
        bg_speed = 0;
    with (obj_bg_square)
    {
        slow_down = 1;
        if (siner < 0)
            siner -= 0.03;
        if (siner < 0)
            siner = 0;
    }
}
if (slow_down == 0)
{
    with (obj_bg_square)
        slow_down = 0;
    if (bg_speed < 0.8)
        bg_speed += 0.03;
}
if (rectsiner >= 20)
{
    var b = instance_create(0, 115, obj_bg_square);
    b.depth = depth + 1;
    rectsiner = 0;
}
if (global.flag[8] == 1)
    bg_speed = 0;
bg_speed = 0.7;
if (!instance_exists(obj_thrash_intro) && !instance_exists(obj_thrash_transformation_transition))
    siner += (bg_speed * f);
if (siner >= 1000)
    siner -= 500;
if (!surface_exists(mysurface))
    mysurface = surface_create(320, 480);
surface_set_target(mysurface);
var remleft = siner;
var oldlen = 0;
for (i = 45; i < 144; i += 1)
{
    if (i == 0)
        oldlen = 2;
    var len = i - ((i * i) / 48);
    var width = abs(oldlen - len) / 2;
    remleft -= width;
    draw_background_part_ext(bg_cityscape, remleft, 0, width, 142, 275 + len, ((i / 16) - ((i * i) / 100)) + 120, 2, (0.9 * (i * i * i)) / 819200, c_white, 0.8);
    oldlen = len;
    if (i > 90)
        i -= 0.5;
}
surface_reset_target();
draw_surface_ext(mysurface, 0, 0, 1, 1, 0, c_white, 1);
draw_surface_ext(mysurface, 640, 0, -1, 1, 0, c_white, 1);
draw_background_part_ext(bg_cityscape, siner, 0, 20, 142, 100 - siner, 50 + siner, 2, 2, c_white, 1);