while (true)
{
    checkcounter = 0;
    var shuff = ds_list_find_value(oControl.list_locations, ds_list_size(oControl.list_locations) - 1);    
    if (shuff == 7 && (oControl.gravity_wall == true || oControl.spider_wall == true)) { } else { checkcounter++; }
    if (shuff != 9) { checkcounter++; }
    if (shuff != 2) { checkcounter++; }
    if (checkcounter == 3) { break; }
    ds_list_shuffle(oControl.list_locations);
}
ds_list_delete(oControl.list_locations, ds_list_size(oControl.list_locations) - 1);
return shuff;