Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If you control a "Photon" or "Galaxy" monster: Target 1 Xyz Monster you control; Special Summon from your Extra Deck, 1 "Photon" or "Galaxy" Xyz Monster that is 4 Ranks higher than that target, by using that target as material. (This is treated as an Xyz Summon. Transfer its materials to the Summoned monster.) You can only activate 1 "Eternal Galaxy" per turn.
--永遠なる銀河
--Eternal Galaxy
--
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_PHOTON,SET_GALAXY}
function s.cfilter(c)
	return c:IsFaceup() and (c:IsSetCard(SET_PHOTON) or c:IsSetCard(SET_GALAXY))
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_MZONE,0,1,nil)
end
function s.filter1(c,e,tp)
	local rk=c:GetRank()
	local pg=aux.GetMustBeMaterialGroup(tp,Group.FromCards(c),tp,nil,nil,REASON_XYZ)
	return (#pg<=0 or (#pg==1 and pg:IsContains(c))) and c:IsFaceup() and c:IsType(TYPE_XYZ)
		and Duel.IsExistingMatchingCard(s.filter2,tp,LOCATION_EXTRA,0,1,nil,e,tp,c,rk+4,pg)
end
function s.filter2(c,e,tp,mc,rk,pg)
	if c.rum_limit and not c.rum_limit(mc,e) then return false end
	return c:IsRank(rk) and (c:IsSetCard(SET_PHOTON) or c:IsSetCard(SET_GALAXY)) and Duel.GetLocationCountFromEx(tp,tp,mc,c)>0
		and mc:IsCanBeXyzMaterial(c) and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_XYZ,tp,false,false)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_MZONE) and s.filter1(chkc,e,tp) end
	if chk==0 then return Duel.IsExistingTarget(s.filter1,tp,LOCATION_MZONE,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,s.filter1,tp,LOCATION_MZONE,0,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	local pg=aux.GetMustBeMaterialGroup(tp,Group.FromCards(tc),tp,nil,nil,REASON_XYZ)
	if tc:IsFacedown() or not tc:IsRelateToEffect(e) or tc:IsControler(1-tp) or tc:IsImmuneToEffect(e) or #pg>1 or (#pg==1 and not pg:IsContains(tc)) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.filter2,tp,LOCATION_EXTRA,0,1,1,nil,e,tp,tc,tc:GetRank()+4,pg)
	local sc=g:GetFirst()
	if sc then
		sc:SetMaterial(tc)
		Duel.Overlay(sc,tc)
		Duel.SpecialSummon(sc,SUMMON_TYPE_XYZ,tp,tp,false,false,POS_FACEUP)
		sc:CompleteProcedure()
	end
end