Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Send any number of monsters from your side of the field to the Graveyard to activate this card. Select from your Deck 1 "Alien" monster whose Level is equal to the total Levels of the sent monsters, and Special Summon it. If you fail to find a monster to Special Summon, you take 2000 damage.
--ミステリーサークル
--Crop Circles
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMING_END_PHASE)
	e1:SetLabel(0)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_ALIEN}
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	e:SetLabel(100)
	return true
end
function s.filter1(c,e,tp,cg,minc)
	return c:IsSetCard(SET_ALIEN) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
		and cg:CheckWithSumEqual(Card.GetLevel,c:GetLevel(),minc,99)
end
function s.cgfilter(c)
	return c:HasLevel() and c:IsAbleToGraveAsCost() and c:IsMonsterCard()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	local cg=Duel.GetMatchingGroup(s.cgfilter,tp,LOCATION_MZONE,0,nil)
	local ft=Duel.GetLocationCount(tp,LOCATION_MZONE)
	local minc=-ft+1
	if minc<=0 then minc=1 end
	if chk==0 then
		if e:GetLabel()~=100 then return false end
		e:SetLabel(0)
		return Duel.IsExistingMatchingCard(s.filter1,tp,LOCATION_DECK,0,1,nil,e,tp,cg,minc)
	end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local rg=Duel.SelectMatchingCard(tp,s.filter1,tp,LOCATION_DECK,0,1,1,nil,e,tp,cg,minc)
	e:SetLabel(rg:GetFirst():GetLevel())
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local sg=cg:SelectWithSumEqual(tp,Card.GetLevel,e:GetLabel(),minc,99)
	Duel.SendtoGrave(sg,REASON_COST)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.filter2(c,e,tp,lv)
	return c:IsSetCard(SET_ALIEN) and c:GetLevel()==lv and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then Duel.Damage(tp,2000,REASON_EFFECT) return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.filter2,tp,LOCATION_DECK,0,1,1,nil,e,tp,e:GetLabel())
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	else Duel.Damage(tp,2000,REASON_EFFECT) end
end