public checkpointUpdate()
{
  for(new i=0; i<MAX_PLAYERS; i++)
  {
      if(IsPlayerConnected(i)) {
          for(new j=0; j < MAX_POINTS; j++) {
              if(IsPlayerInAr(i, checkCoords[j])) {
                  if(playerCheckpoint[i]!=j) {
                      DisablePlayerCheckpoint(i);
       SetPlayerCheckpoint(i, checkpoints[j][0],checkpoints[j][1],checkpoints[j][2], 2);
       playerCheckpoint[i] = j;
      }
              } else {
               if(playerCheckpoint[i]==j) {
                   DisablePlayerCheckpoint(i);
                   playerCheckpoint[i] = 999;
                }
              }
          }
   }
  }
}