void main()
{
    object oPC = GetExitingObject();
    string sKeyColor = GetStringLowerCase(GetName(OBJECT_SELF));
    object oKeyholder = GetLocalObject(OBJECT_SELF, "KEYHOLDER");
    object oKey = GetItemPossessedBy(oPC, "nk_fp_key"+sKeyColor);
    if ((GetIsObjectValid(oKey)) || (oPC == oKeyholder))
    {
        object oBrain = GetNearestObjectByTag("nk_fp_brain", OBJECT_SELF, 1);
        SetLocalInt(oBrain, GetName(OBJECT_SELF), 0);
    }
}