[Baboon]

Under OnGameModeInit

Код:

SetTimer("healthchecker", 500, true);

Above OnGameModeInit

Код:

new ivebeenzombied[MAX_PLAYERS];

somewhere in the script (for example last lines):

Код:

forward healthchecker();
public healthchecker()
{
      for(new i = 0; i < MAX_PLAYERS; i++)
      {
            if(IsPlayerConnected(i))
            {
                   new Float: health;
                   GetPlayerHealth(playerid, health);
                   if(ivebeenzombied[i] == 1) return 1;//to stop the code, otherwise it will repeat all the time
                   if(health < 100) //checks if the player has less health than 100.
                   {
                          code...
                          ivebeenzombied[i] = 1;
                   }
            }
      }
      return 1;
}

Hope it will help you.