[PrawkC]

pawn Код:

new spawnIdx; // Global variable, used to determin last spawned index

new Float:VehicleSpawnLocs[2][3] =
{
      {533.1320,-1316.8053,16.9984,92.6},
      {537.8416,-1321.7615,16.9943,92.6}
};

stock GrottiSpawnVehicle(Your Params Here)
{
    if(spawnIdx > sizeof(VehicleSpawnLocs))
    {
        spawnIdx = 0;
    }
    else
    {
        spawnIdx++;
    }
    new Float:x = VehicleSpawnLocs[spawnIdx][0],
    Float:y = VehicleSpawnLocs[spawnIdx][1],
    Float:z = VehicleSpawnLocs[spawnIdx][2]; 
    CreateVehicle(...)
}

Something like that