void main()
{
object oPC = GetLastUsedBy();
object oSelf = OBJECT_SELF;

//Stop anyone from using if someone is already using it.
//I think this function doesn't work properly, I will test it.
/*
if (GetIsOpen(oSelf))
   {
   AssignCommand(oPC, ClearAllActions());
   AssignCommand(oPC, ActionMoveAwayFromObject(oSelf));
   }
*/

//If the opener has the proper key, stop the script
if (GetItemPossessedBy(oPC, "barrel2")!= OBJECT_INVALID)
   return;

//Otherwise go away!
   AssignCommand(oPC, ClearAllActions());
   AssignCommand(oPC, ActionMoveAwayFromObject(oSelf));

}