var layer_scroll_speed;
layer_scroll_speed[0] = 0.1;
layer_scroll_speed[1] = 0.2;
layer_scroll_speed[2] = 0.3;
layer_scroll_speed[3] = 0.4;
layer_scroll_speed[4] = 0.7;
layer_scroll_speed[5] = 3;
for (var i = 0; i < 6; i++)
    __background_set(e__BG.X, i, __background_get(UnknownEnum.Value_3, i) - layer_scroll_speed[i]);
if (bg_image_index < 5)
    bg_image_index += 0.1;
else
    bg_image_index = 1;
__background_set(e__BG.Index, 1, asset_get_index("hotland_background_" + string(floor(bg_image_index))));

enum UnknownEnum
{
    Value_2 = 2,
    Value_3
}

enum e__BG
{
    Visible,
    Foreground,
    Index,
    X,
    Y,
    Width,
    Height,
    HTiled,
    VTiled,
    XScale,
    YScale,
    HSpeed,
    VSpeed,
    Blend,
    Alpha
}