[Chandler]

function onCreated()
  {
  this.canWarp();
  this.battleGrounds = {
    {"gmap", {1, 2, 3, "3a"}},
    {"nw", {"1_cavec1", "1_cavea1"}}
  }; 
  setTimer(5);
  }

function onTimeOut()
  {
  for (temp.levelData: this.battleGrounds)
    for (temp.curArea: temp.levelData[1])
      {
      warpto("syn_battleground"@ temp.curArea  @"."@ temp.levelData[0], 0, 0);
      temp.allNPCs = findareanpcs(this.x, this.y, 5000, 5000);
      for (temp.foundNPC: temp.allNPCs)
        temp.foundNPC.trigger("update", "");
      }
  setTimer(5);
  }

Did some alterations...