Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 4 monsters You can detach 1 material from this card, then activate 1 of these effects; ● Add 1 Rock monster from your Deck to your hand. ● Special Summon 1 Rock monster from your hand in face-down Defense Position. You can only use this effect of "Gallant Granite" once per turn.
--御影志士
--Gallant Granite
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Xyz Summon procedure
	Xyz.AddProcedure(c,nil,4,2)
	--Activate 1 of these effects
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1,id)
	e1:SetCost(Cost.DetachFromSelf(1,1,nil))
	e1:SetTarget(s.efftg)
	e1:SetOperation(s.effop)
	c:RegisterEffect(e1)
end
function s.thfilter(c)
	return c:IsRace(RACE_ROCK) and c:IsAbleToHand()
end
function s.spfilter(c,e,tp)
	return c:IsRace(RACE_ROCK) and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEDOWN_DEFENSE)
end
function s.efftg(e,tp,eg,ep,ev,re,r,rp,chk)
	local b1=Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil)
	local b2=Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND,0,1,nil,e,tp)
	if chk==0 then return b1 or b2 end
	local op=Duel.SelectEffect(tp,
		{b1,aux.Stringid(id,1)},
		{b2,aux.Stringid(id,2)})
	e:SetLabel(op)
	if op==1 then
		e:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
		Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
	elseif op==2 then
		e:SetCategory(CATEGORY_SPECIAL_SUMMON)
		Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
	end
end
function s.effop(e,tp,eg,ep,ev,re,r,rp)
	local op=e:GetLabel()
	if op==1 then
		--Search 1 Rock monster
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
		if #g>0 then
			Duel.SendtoHand(g,nil,REASON_EFFECT)
			Duel.ConfirmCards(1-tp,g)
		end
	elseif op==2 then
		--Special Summon 1 Rock monster from your hand in face-down Defense Position
		if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND,0,1,1,nil,e,tp)
		if #g>0 then
			Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEDOWN_DEFENSE)
			Duel.ConfirmCards(1-tp,g)
		end
	end
end