void main()
{
  object oMod=GetModule();
  int nDisableNonEssential=GetLocalInt(oMod,"nDisableNonEssential");
  if (nDisableNonEssential!=TRUE)
  { // not disabled
  int nN=GetLocalInt(OBJECT_SELF,"nHB");
  if (nN<3)
  { // heartbeat
    nN++;
    SetLocalInt(OBJECT_SELF,"nHB",nN);
  } // heartbeat
  else
  {
    nN=GetLocalInt(GetArea(OBJECT_SELF),"nPlume");
    nN=nN-1;
    SetLocalInt(GetArea(OBJECT_SELF),"nPlume",nN);
    DestroyObject(OBJECT_SELF);
  }
  } // not disabled
  else { DestroyObject(OBJECT_SELF); }
}