Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by having 5 or more DARK monsters in your Graveyard while you control no monsters. Once per turn: You can banish 1 DARK monster from your Graveyard to target 1 DARK monster in your Graveyard; Special Summon that target.
--ダーク・クリエイター
--The Dark Creator
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.spcon)
	c:RegisterEffect(e1)
	--SpecialSummon
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetCountLimit(1)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCost(s.cost)
	e2:SetTarget(s.target)
	e2:SetOperation(s.operation)
	c:RegisterEffect(e2)
end
function s.spcon(e,c)
	if c==nil then return true end
	return Duel.GetLocationCount(c:GetControler(),LOCATION_MZONE)>0
		and Duel.GetFieldGroupCount(c:GetControler(),LOCATION_MZONE,0)==0
		and Duel.IsExistingMatchingCard(Card.IsAttribute,c:GetControler(),LOCATION_GRAVE,0,5,nil,ATTRIBUTE_DARK)
end
function s.costfilter(c,e,tp)
	return c:IsAttribute(ATTRIBUTE_DARK) and c:IsAbleToRemoveAsCost() and aux.SpElimFilter(c,true)
		and Duel.IsExistingTarget(s.tgfilter,tp,LOCATION_GRAVE,0,1,c,e,tp)
end
function s.tgfilter(c,e,tp)
	return c:IsAttribute(ATTRIBUTE_DARK) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	e:SetLabel(1)
	return true
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.tgfilter(chkc,e,tp) end
	if chk==0 then
		if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return false end
		if e:GetLabel()==1 then
			e:SetLabel(0)
			return Duel.IsExistingMatchingCard(s.costfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,nil,e,tp)
		else
			return Duel.IsExistingTarget(s.tgfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp)
		end
	end
	if e:GetLabel()==1 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
		local cg=Duel.SelectMatchingCard(tp,s.costfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,1,nil,e,tp)
		Duel.Remove(cg,POS_FACEUP,REASON_COST)
		e:SetLabel(0)
	end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.tgfilter,tp,LOCATION_GRAVE,0,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
	end
end