Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When a Spell effect that would inflict damage to you is activated: You take no damage from that effect. While this card is in your Graveyard, you take no damage from the effect of "Sargasso the D.D. Battlefield". When this Set card is sent to the Graveyard: You can add 1 "Sargasso the D.D. Battlefield" from your Deck to your hand.
--サルガッソの灯台
--Sargasso Lighthouse
local s,id=GetID()
function s.initial_effect(c)
	--damage change
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_CHAINING)
	e1:SetCondition(s.condition)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e2:SetCode(id)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetTargetRange(1,0)
	c:RegisterEffect(e2)
	--search
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e3:SetCode(EVENT_TO_GRAVE)
	e3:SetCondition(s.thcon)
	e3:SetTarget(s.thtg)
	e3:SetOperation(s.thop)
	c:RegisterEffect(e3)
end
s.listed_names={1127737}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return re:IsSpellEffect() and aux.damcon1(e,tp,eg,ep,ev,re,r,rp)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local cid=Duel.GetChainInfo(ev,CHAININFO_CHAIN_ID)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CHANGE_DAMAGE)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetTargetRange(1,0)
	e1:SetLabel(cid)
	e1:SetValue(s.damcon)
	e1:SetReset(RESET_CHAIN)
	Duel.RegisterEffect(e1,tp)
end
function s.damcon(e,re,val,r,rp,rc)
	local cc=Duel.GetCurrentChain()
	if cc==0 or (r&REASON_EFFECT)==0 then return val end
	local cid=Duel.GetChainInfo(0,CHAININFO_CHAIN_ID)
	if cid==e:GetLabel() then return 0 else return val end
end
function s.thcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD) and e:GetHandler():IsPreviousPosition(POS_FACEDOWN)
end
function s.filter(c)
	return c:IsCode(1127737) and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstMatchingCard(s.filter,tp,LOCATION_DECK,0,nil)
	if tc then
		Duel.SendtoHand(tc,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,tc)
	end
end