Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Change as many Defense Position monsters on the field as possible to face-up Attack Position, then Special Summon 1 "Meklord" monster from your Deck or GY, but its effects are negated, also it is destroyed during the End Phase.
--カオス・インフィニティ
--Chaos Infinity
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION+CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMING_END_PHASE)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_MEKLORD}
function s.spfilter(c,e,tp)
	return c:IsSetCard(SET_MEKLORD) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDefensePos,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil)
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_DECK|LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK|LOCATION_GRAVE)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(Card.IsDefensePos,tp,LOCATION_MZONE,LOCATION_MZONE,nil)
	if #g==0 then return end
	Duel.ChangePosition(g,POS_FACEUP_ATTACK)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local sg=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter),tp,LOCATION_DECK|LOCATION_GRAVE,0,1,1,nil,e,tp)
	local tc=sg:GetFirst()
	if tc then
		Duel.BreakEffect()
		Duel.SpecialSummonStep(tc,0,tp,tp,false,false,POS_FACEUP)
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_DISABLE)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1,true)
		local e2=Effect.CreateEffect(e:GetHandler())
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_DISABLE_EFFECT)
		e2:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e2,true)
		Duel.SpecialSummonComplete()
		local e3=Effect.CreateEffect(e:GetHandler())
		e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		e3:SetRange(LOCATION_MZONE)
		e3:SetCode(EVENT_PHASE+PHASE_END)
		e3:SetOperation(s.desop)
		e3:SetReset(RESETS_STANDARD_PHASE_END)
		e3:SetCountLimit(1)
		tc:RegisterEffect(e3)
	end
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Destroy(e:GetHandler(),REASON_EFFECT)
end