Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
[ Pendulum Effect ] You cannot Pendulum Summon, except LIGHT monsters (this effect cannot be negated). If you do not control any face-up monsters, other than "Melodious" monsters: You can add 1 "Melodious" Spell/Trap from your Deck to your hand. You can only use this effect of "Couplet the Melodious Songstress" once per turn. ---------------------------------------- [ Monster Effect ] If this card is added to your hand, except by drawing it for your normal draw: You can reveal this card; Special Summon 1 Level 4 or lower "Melodious" monster from your hand or GY. If a "Melodious" Fusion Monster(s) is Special Summoned to your field, while this card is face-up in your Extra Deck (except during the Damage Step): You can place this card in your Pendulum Zone. You can only use each effect of "Couplet the Melodious Songstress" once per turn.
--幻奏の歌姫クープレ
--Couplet the Melodious Songstress
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--Pendulum Summon
	Pendulum.AddProcedure(c)
	--Cannot Pendulum Summon monsters, except LIGHT monsters
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET+EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CANNOT_NEGATE)
	e1:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e1:SetRange(LOCATION_PZONE)
	e1:SetTargetRange(1,0)
	e1:SetTarget(function(e,_c,tp,sumtp,sumpos) return not _c:IsAttribute(ATTRIBUTE_LIGHT) and (sumtp&SUMMON_TYPE_PENDULUM)==SUMMON_TYPE_PENDULUM end)
	c:RegisterEffect(e1)
	--Search 1 "Melodious" Spell/Trap
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_PZONE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.thcon)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
	--Special Summon 1 Level 4 or lower "Melodious" monster from your hand or GY
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_TO_HAND)
	e3:SetCountLimit(1,{id,1})
	e3:SetCondition(function(e) return not e:GetHandler():IsReason(REASON_RULE) end)
	e3:SetCost(s.spcost)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
	--Place this card in your Pendulum Zone
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,2))
	e4:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e4:SetProperty(EFFECT_FLAG_DELAY,EFFECT_FLAG2_CHECK_SIMULTANEOUS)
	e4:SetCode(EVENT_SPSUMMON_SUCCESS)
	e4:SetRange(LOCATION_EXTRA)
	e4:SetCountLimit(1,{id,2})
	e4:SetCondition(s.pencon)
	e4:SetTarget(s.pentg)
	e4:SetOperation(s.penop)
	c:RegisterEffect(e4)
end
s.listed_series={SET_MELODIOUS}
function s.thcon(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(Card.IsFaceup,tp,LOCATION_MZONE,0,nil)
	return g:FilterCount(Card.IsSetCard,nil,SET_MELODIOUS)==#g
end
function s.thfilter(c)
	return c:IsSetCard(SET_MELODIOUS) and c:IsSpellTrap() and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end
function s.spcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return not e:GetHandler():IsPublic() end
end
function s.spfilter(c,e,tp)
	return c:IsSetCard(SET_MELODIOUS) and c:IsLevelBelow(4) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND|LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND|LOCATION_GRAVE)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)==0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter),tp,LOCATION_HAND|LOCATION_GRAVE,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end
function s.cfilter(c,tp)
	return c:IsFaceup() and c:IsSetCard(SET_MELODIOUS) and c:IsType(TYPE_FUSION) and c:IsControler(tp)
end
function s.pencon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil,tp)
end
function s.pentg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckPendulumZones(tp) end
end
function s.penop(e,tp,eg,ep,ev,re,r,rp)
	if not Duel.CheckPendulumZones(tp) then return end
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.MoveToField(c,tp,tp,LOCATION_PZONE,POS_FACEUP,true)
	end
end