Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 4 monsters For this card's Xyz Summon, you can treat Rank 4 monsters you control as Level 4 monsters for material. You can detach 1 material from this card; this card can make up to 2 attacks on monsters during each Battle Phase this turn. If this card is sent to the GY: You can target 2 other Rank 4 or lower Xyz Monsters in your GY; Special Summon 1 of them and attach the other to it as material. You can only use this effect of "Eclipse Twins" once per turn.
--蝕の双仔
--Eclipse Twins
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Xyz Summon Procedure: 2 Level 4 monsters
	Xyz.AddProcedure(c,nil,4,2)
	--For this card's Xyz Summon, you can treat Rank 4 monsters you control as Level 4 monsters for material
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_FIELD)
	e0:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_IGNORE_IMMUNE)
	e0:SetCode(EFFECT_XYZ_LEVEL)
	e0:SetRange(LOCATION_EXTRA)
	e0:SetTargetRange(LOCATION_MZONE,0)
	e0:SetTarget(function(e,c) return c:IsRank(4) end)
	e0:SetValue(function(e,_,rc) return rc==e:GetHandler() and 4 or 0 end)
	c:RegisterEffect(e0)
	--This card can make up to 2 attacks on monsters during each Battle Phase this turn
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(function() return Duel.IsAbleToEnterBP() end)
	e1:SetCost(Cost.DetachFromSelf(1,1,nil))
	e1:SetTarget(s.atktg)
	e1:SetOperation(s.atkop)
	c:RegisterEffect(e1)
	--Special Summon 1 Rank 4 or lower Xyz monster from the GY and attach another to it
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetCountLimit(1,id)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		local c=e:GetHandler()
		return c:GetEffectCount(EFFECT_EXTRA_ATTACK)==0 and c:GetEffectCount(EFFECT_EXTRA_ATTACK_MONSTER)==0
	end
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		--This card can make up to 2 attacks on monsters during each Battle Phase this turn
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(3202)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CLIENT_HINT)
		e1:SetCode(EFFECT_EXTRA_ATTACK_MONSTER)
		e1:SetValue(1)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		c:RegisterEffect(e1)
	end
end
function s.xyzfilter(c,e)
	return c:IsType(TYPE_XYZ) and c:IsRankBelow(4) and c:IsCanBeEffectTarget(e)
end
function s.rescon(sg,e,tp,mg)
	return sg:IsExists(s.spfilter,1,nil,e,tp,sg)
end
function s.spfilter(c,e,tp,sg)
	return c:IsCanBeSpecialSummoned(e,0,tp,false,false) and sg:IsExists(Card.IsCanBeXyzMaterial,1,c,c,tp,REASON_EFFECT)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	local g=Duel.GetMatchingGroup(s.xyzfilter,tp,LOCATION_GRAVE,0,e:GetHandler(),e)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and aux.SelectUnselectGroup(g,e,tp,2,2,s.rescon,0) end
	local tg=aux.SelectUnselectGroup(g,e,tp,2,2,s.rescon,1,tp,HINTMSG_TARGET)
	Duel.SetTargetCard(tg)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,tg,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_LEAVE_GRAVE,tg,1,tp,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g~=2 or Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local sc=g:FilterSelect(tp,Card.IsCanBeSpecialSummoned,1,1,nil,e,0,tp,false,false):GetFirst()
	if sc and Duel.SpecialSummon(sc,0,tp,tp,false,false,POS_FACEUP)>0 then
		g:RemoveCard(sc)
		Duel.Overlay(sc,g)
	end
end