Script: Trap wall vanish

inherits globals;

trigger creation
{
  int Q5A2 = getObjType(this);
  setObjVar(this, "myObjType", Q5A2);
  setType(this, 0x01);
  return (0x00);
}

trigger enterrange(0x02)
{
  if (isDead(target))
  {
    return (0x01);
  }
  int Q5A2 = getObjVar(this, "myObjType");
  if (getObjType(this) != Q5A2)
  {
    setType(this, Q5A2);
    setObjVar(this, "working", 0x01);
    callback(this, 0x03, 0x24);
  }
  return (0x01);
}

trigger callback(0x24)
{
  list Q67G;
  clearList(Q67G);
  getMobsInRange(Q67G, getLocation(this), 0x03);
  if (numInList(Q67G) == 0x00)
  {
    setType(this, 0x01);
    removeObjVar(this, "working");
    return (0x00);
  }
  callback(this, 0x03, 0x24);
  return (0x00);
}