Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
[ Pendulum Effect ] Pendulum Summons of your "Solfachord" Pendulum Monsters cannot be negated. ---------------------------------------- [ Monster Effect ] While you have an even Pendulum Scale in your Pendulum Zone, you take no damage from battles involving your "Solfachord" Pendulum Monsters. If this card is Normal or Special Summoned: You can target 1 Spell/Trap your opponent controls; return it to the hand. You can only use this effect of "MiSolfachord Eliteia" once per turn.
--ミドレミコード・エリーティア
--MiSolfachord Eliteia
--scripted by Hatter
local s,id=GetID()
function s.initial_effect(c)
	--pendulum summon
	Pendulum.AddProcedure(c)
	--cannot disable pendulum summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CANNOT_DISABLE_SPSUMMON)
	e1:SetProperty(EFFECT_FLAG_IGNORE_RANGE+EFFECT_FLAG_SET_AVAILABLE)
	e1:SetRange(LOCATION_PZONE)
	e1:SetTargetRange(1,0)
	e1:SetTarget(s.target)
	c:RegisterEffect(e1)
	--return target to hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_TOHAND)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_SUMMON_SUCCESS)
	e2:SetCountLimit(1,id)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
	local e3=e2:Clone()
	e3:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e3)
	--no battle damage
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD)
	e4:SetCode(EFFECT_AVOID_BATTLE_DAMAGE)
	e4:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e4:SetRange(LOCATION_MZONE)
	e4:SetTargetRange(LOCATION_MZONE,0)
	e4:SetCondition(s.damcon)
	e4:SetTarget(s.efilter)
	e4:SetValue(1)
	c:RegisterEffect(e4)
end
s.listed_series={SET_SOLFACHORD}
function s.target(e,c)
	return c:IsPendulumSummoned() and c:IsSetCard(SET_SOLFACHORD) and c:IsType(TYPE_PENDULUM)
end
function s.thfilter(c)
	return c:IsSpellTrap() and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_ONFIELD) and chkc:IsSpellTrap() and chkc:IsAbleToHand() and chkc:IsController(1-tp) end
	if chk==0 then return Duel.IsExistingTarget(s.thfilter,tp,0,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_RTOHAND)
	local g=Duel.SelectTarget(tp,s.thfilter,tp,0,LOCATION_ONFIELD,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,g,#g,0,0)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
	end
end
function s.damcon(e)
	return Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsEvenScale),e:GetHandlerPlayer(),LOCATION_PZONE,0,1,nil)
end
function s.efilter(e,c)
	return c:IsSetCard(SET_SOLFACHORD) and c:IsType(TYPE_PENDULUM)
end