[M1GU3L]

I've got something like this:

pawn Код:

SetTimer("OneSecondTimer", 1000, true);

pawn Код:

public OneSecondTimer(playerid)
{
  Server[Seconds]++;
  if(Server[Seconds] == 60) 
  {
    Server[Minutes]++;
  }
  bla...
  bla...
  bla...
  return 1;
}

What I want to do is every 10 minutes something happens, so I tried this:

pawn Код:

public OneSecondTimer(playerid)
{
  Server[Seconds]++;
  if(Server[Seconds] == 60) 
  {
    Server[Minutes]++;
  }
  bla...
  bla...
  bla...
  else if(Server[Minutes] == 0 || Server[Minutes] == 10 || Server[Minutes] == 20 || Server[Minutes] == 30 || Server[Minutes] == 40 || Server[Minutes] == 50)
  {
    // do something
  }
  return 1;
}

But by doing that, "do something" would be repeated 60 times in a minute, and I want it to be done just once every 10 minutes. How can I do it?
(I decided to use this in order to not use too many timers).

Thanks!