if (!instance_exists(obj_starlo_boss_body))
    return;
if (timer == 0)
{
    timer = room_speed * 5
    switch irandom_range(1, 3)
    {
        case 1:
            instance_create_depth(660, random_range(210, 230), (obj_starlo_boss_body.depth - 1), obj_tumble_large)
            break
        case 2:
            instance_create_depth(660, random_range(180, 210), (depth + 2), obj_tumble_medium)
            break
        default:
            instance_create_depth(660, random_range(160, 190), (depth + 3), obj_tumble_small)
    }

}
timer--