Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Activate this card by discarding 1 card and sending 2 "Frightfur" monsters from your Extra Deck to the Graveyard. All Fusion Monsters you control are also treated as "Frightfur" monsters. If this card is sent to the Graveyard: You can target 1 "Frightfur" Fusion Monster in your Graveyard; return it to the Extra Deck.
--デストーイ・サンクチュアリ
--Frightfur Sanctuary
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(s.cost)
	c:RegisterEffect(e1)
	--add setcode
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(aux.TargetBoolFunction(Card.IsType,TYPE_FUSION))
	e2:SetCode(EFFECT_ADD_SETCODE)
	e2:SetValue(SET_FRIGHTFUR)
	c:RegisterEffect(e2)
	--return
	local e3=Effect.CreateEffect(c)
	e3:SetCategory(CATEGORY_TODECK)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_TO_GRAVE)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DELAY)
	e3:SetTarget(s.tdtg)
	e3:SetOperation(s.tdop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_FRIGHTFUR}
function s.cfilter(c)
	return c:IsSetCard(SET_FRIGHTFUR) and c:IsType(TYPE_FUSION) and c:IsAbleToGraveAsCost()
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,e:GetHandler())
		and Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_EXTRA,0,2,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_EXTRA,0,2,2,nil)
	Duel.SendtoGrave(g,REASON_COST)
end
function s.filter(c)
	return c:IsSetCard(SET_FRIGHTFUR) and c:IsType(TYPE_FUSION) and c:IsAbleToExtra()
end
function s.tdtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_GRAVE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TODECK)
	local g=Duel.SelectTarget(tp,s.filter,tp,LOCATION_GRAVE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TODECK,g,1,0,0)
end
function s.tdop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SendtoDeck(tc,nil,SEQ_DECKTOP,REASON_EFFECT)
	end
end