void main()
{
if (GetIsPC(GetEnteringObject() ))
 {
  SendMessageToPC( GetEnteringObject(), "You feel that you are being followed by someone or something.");
  DestroyObject(GetObjectByTag("DI2"));
  object npc = GetNearestObjectByTag("GarethIH");
  AssignCommand(npc,SpeakString("We need to be on our guard."));
  }
}