Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
This linked card cannot be destroyed by battle. You can only use each of the following effects of "NT8000 - SIRIUS" once per turn. During the turn a Link Monster's effect was activated (Quick Effect): You can target 1 face-up card you control and 1 face-up card your opponent controls; destroy both. If this card is sent to the GY, except from the field, and you control a DARK Link Monster: You can Special Summon this card, but banish it when it leaves the field.
--ＮＴ８０００－ＳＩＲＩＵＳ
--NT8000 - SIRIUS
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--This linked card cannot be destroyed by battle
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(function(e) return e:GetHandler():IsLinked() end)
	e1:SetValue(1)
	c:RegisterEffect(e1)
	--Destroy 1 face-up card you control and 1 face-up card your opponent controls
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_DESTROY)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_FREE_CHAIN)
	e2:SetRange(LOCATION_MZONE)
	e2:SetHintTiming(0,TIMING_MAIN_END|TIMINGS_CHECK_MONSTER_E)
	e2:SetCountLimit(1,id)
	e2:SetCondition(function() return Duel.GetCustomActivityCount(id,0,ACTIVITY_CHAIN)>0 or Duel.GetCustomActivityCount(id,1,ACTIVITY_CHAIN)>0 end)
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
	--Check if the effect of a Link Monster was activated this turn
	Duel.AddCustomActivityCounter(id,ACTIVITY_CHAIN,function(re) return not re:GetHandler():IsLinkMonster() end)
	--Special Summon this card from the GY
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_TO_GRAVE)
	e3:SetCountLimit(1,{id,1})
	e3:SetCondition(function(e) return not e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD) end)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	if chk==0 then return Duel.IsExistingTarget(Card.IsFaceup,tp,LOCATION_ONFIELD,0,1,nil)
		and Duel.IsExistingTarget(Card.IsFaceup,tp,0,LOCATION_ONFIELD,1,nil) end
	local g=Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsCanBeEffectTarget,e),tp,LOCATION_ONFIELD,LOCATION_ONFIELD,nil)
	local dg=aux.SelectUnselectGroup(g,e,tp,2,2,aux.dpcheck(Card.GetControler),1,tp,HINTMSG_DESTROY)
	Duel.SetTargetCard(dg)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,dg,#dg,tp,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tg=Duel.GetTargetCards(e)
	if #tg==2 then
		Duel.Destroy(tg,REASON_EFFECT)
	end
end
function s.darklinkfilter(c)
	return c:IsAttribute(ATTRIBUTE_DARK) and c:IsLinkMonster() and c:IsFaceup()
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
		and Duel.IsExistingMatchingCard(s.darklinkfilter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)>0 then
		--Banish it when it leaves the field
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(3300)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CLIENT_HINT)
		e1:SetCode(EFFECT_LEAVE_FIELD_REDIRECT)
		e1:SetValue(LOCATION_REMOVED)
		e1:SetReset(RESET_EVENT|RESETS_REDIRECT)
		c:RegisterEffect(e1,true)
	end
end