Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Change all face-down monsters on the field to face-up Defense Position. During the End Phase this turn, change all face-up LIGHT Reptile-Type monsters you control to face-down Defense Position, then draw 1 card for each. After that, you can Special Summon 1 Level 7 or higher LIGHT Reptile-Type monster from your Deck.
--W星雲隕石
--W Nebula Meteorite
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION+CATEGORY_SPECIAL_SUMMON+CATEGORY_DRAW)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsFacedown,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	local g=Duel.GetMatchingGroup(Card.IsFacedown,tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,#g,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(Card.IsFacedown,tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	if #g>0 then
		Duel.ChangePosition(g,POS_FACEUP_DEFENSE)
	end
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetCountLimit(1)
	e1:SetReset(RESET_PHASE|PHASE_END)
	e1:SetCondition(s.setcon)
	e1:SetOperation(s.setop)
	Duel.RegisterEffect(e1,tp)
end
function s.sfilter(c)
	return c:IsFaceup() and c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_REPTILE) and c:IsCanTurnSet()
end
function s.spfilter(c,e,tp)
	return c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_REPTILE) and c:GetLevel()>=7
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.setcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.sfilter,tp,LOCATION_MZONE,0,1,nil)
end
function s.setop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.sfilter,tp,LOCATION_MZONE,0,nil)
	if #g>0 then
		Duel.ChangePosition(g,POS_FACEDOWN_DEFENSE)
		local dt=Duel.Draw(tp,#g,REASON_EFFECT)
		if dt==0 or Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
		local sg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_DECK,0,nil,e,tp)
		if #sg>0 and Duel.SelectYesNo(tp,aux.Stringid(id,0)) then
			Duel.BreakEffect()
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
			Duel.SpecialSummon(sg:Select(tp,1,1,nil),0,tp,tp,false,false,POS_FACEUP)
		end
	end
end