Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Special Summon 2 "Doomsday Tokens" (Fiend/DARK/Level 1/ATK 0/DEF 0) in Defense Position. They cannot be Tributed for a Tribute Summon, unless it is for a DARK monster. You cannot Summon other monsters the turn you activate this card (but you can Normal Set).
--終焉の焔
--Fires of Doomsday
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+CATEGORY_TOKEN)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMING_END_PHASE)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_names={46173680}
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetActivityCount(tp,ACTIVITY_SUMMON)==0 and Duel.GetActivityCount(tp,ACTIVITY_FLIPSUMMON)==0
		and Duel.GetActivityCount(tp,ACTIVITY_SPSUMMON)==0 end
	--Cannot Summon other monsters
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetDescription(aux.Stringid(id,1))
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET+EFFECT_FLAG_OATH+EFFECT_FLAG_CLIENT_HINT)
	e1:SetCode(EFFECT_CANNOT_SUMMON)
	e1:SetTargetRange(1,0)
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_CANNOT_FLIP_SUMMON)
	Duel.RegisterEffect(e2,tp)
	local e3=e1:Clone()
	e3:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e3:SetLabelObject(e)
	e3:SetTarget(function(e,_,_,_,_,_,se) return e:GetLabelObject()~=se end)
	Duel.RegisterEffect(e3,tp)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return not Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT)
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>1
		and Duel.IsPlayerCanSpecialSummonMonster(tp,id+1,0,TYPES_TOKEN,0,0,1,RACE_FIEND,ATTRIBUTE_DARK,POS_FACEUP_DEFENSE) end
	Duel.SetOperationInfo(0,CATEGORY_TOKEN,nil,2,0,0)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,2,tp,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) or Duel.GetLocationCount(tp,LOCATION_MZONE)<2
		or not Duel.IsPlayerCanSpecialSummonMonster(tp,id+1,0,TYPES_TOKEN,0,0,1,RACE_FIEND,ATTRIBUTE_DARK,POS_FACEUP_DEFENSE) then return end
	local c=e:GetHandler()
	for i=1,2 do
		local token=Duel.CreateToken(tp,id+i)
		Duel.SpecialSummonStep(token,0,tp,tp,false,false,POS_FACEUP_DEFENSE)
		--Cannot be Tributed for a Tribute Summon of a non-DARK monster
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_UNRELEASABLE_SUM)
		e1:SetValue(function(_,c) return c:IsAttributeExcept(ATTRIBUTE_DARK) end)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		token:RegisterEffect(e1,true)
	end
	Duel.SpecialSummonComplete()
end