Spawn monsters every 3 min (unless already spawned)

[EvoSoft]

Here's the code I want it in:

local pharaoh = {
   ["omruc"] = Storage.TheAncientTombs.Omruc,
   ["thalas"] = Storage.TheAncientTombs.Thalas,
   ["dipthrah"] = Storage.TheAncientTombs.Diphtrah,
   ["mahrdis"] = Storage.TheAncientTombs.Mahrdis,
   ["vashresamun"] = Storage.TheAncientTombs.Vashresamun,
   ["morguthis"] = Storage.TheAncientTombs.Morguthis,
   ["rahemos"] = Storage.TheAncientTombs.Rahemos,
   ["ashmunrah"] = Storage.TheAncientTombs.Ashmunrah
}

function onKill(cid, target)
   local t = Creature(target)
   if(pharaoh[string.lower(t:getName())]) then
     local player = Player(cid)
     Game.setStorageValue(pharaoh[string.lower(t:getName())], 1)
     addEvent(setGlobalStorageValue, 3 * 60 * 1000, pharaoh[string.lower(t:getName())], 0)
     player:say("You now have 3 minutes to exit this room through the teleporter. It will bring you to the reward room.", TALKTYPE_ORANGE_1)
   end
   return true
end

Thanks!