Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 "Majespecter" monster you control; until the end of this turn, its ATK/DEF become double its current ATK/DEF, and if they do, any battle damage it inflicts to your opponent is halved. * The above text is unofficial and describes the card's functionality in the OCG.
--マジェスペクター・ソニック
--Majespecter Sonics
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_ATKCHANGE+CATEGORY_DEFCHANGE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(TIMING_DAMAGE_STEP)
	e1:SetCondition(aux.StatChangeDamageStepCondition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_MAJESPECTER}
function s.filter(c)
	return c:IsFaceup() and c:IsSetCard(SET_MAJESPECTER)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		e1:SetValue(tc:GetAttack()*2)
		tc:RegisterEffect(e1)
		local e2=Effect.CreateEffect(e:GetHandler())
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_SET_DEFENSE_FINAL)
		e2:SetReset(RESETS_STANDARD_PHASE_END)
		e2:SetValue(tc:GetDefense()*2)
		tc:RegisterEffect(e2)
		local e3=Effect.CreateEffect(e:GetHandler())
		e3:SetType(EFFECT_TYPE_SINGLE)
		e3:SetCode(EFFECT_CHANGE_BATTLE_DAMAGE)
		e3:SetReset(RESETS_STANDARD_PHASE_END)
		e3:SetValue(aux.ChangeBattleDamage(1,HALF_DAMAGE))
		tc:RegisterEffect(e3)
	end
end