Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When you Normal Summon a "Resonator" monster: You can Special Summon this card from your hand, but its ATK becomes halved.
--レッド・ウルフ 
--Red Warg
local s,id=GetID()
function s.initial_effect(c)
	--summon success
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
s.listed_series={SET_RESONATOR}
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return ep==tp and eg:GetFirst():IsSetCard(SET_RESONATOR)
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 e:GetHandler():IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	if Duel.SpecialSummonStep(c,0,tp,tp,false,false,POS_FACEUP) then
		local atk=c:GetAttack()
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetValue(atk/2)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e1,true)
	end
	Duel.SpecialSummonComplete()
end