if (instance_exists(obj_counterscroller))
{
    if (obj_counterscroller.fakev > -1)
        obj_counterscroller.fakev -= 6;
    if (obj_counterscroller.fakev < -1)
        obj_counterscroller.fakev = -1;
    if (instance_exists(obj_shaker) == 0)
        scr_shake(2, 2, 2);
}