Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 face-up monster your opponent controls; the ATK of all other monsters currently on the field become equal to that monster's current ATK, until the end of this turn.
--単一化
--Universal Adapter
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP)
	e1:SetCondition(aux.StatChangeDamageStepCondition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.filter(c,tp)
	return c:IsFaceup() and Duel.IsExistingMatchingCard(s.filter2,tp,LOCATION_MZONE,LOCATION_MZONE,1,c,c:GetAttack())
end
function s.filter2(c,atk)
	return c:IsFaceup() and c:GetAttack()~=atk
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,tp) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,0,LOCATION_MZONE,1,nil,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,s.filter,tp,0,LOCATION_MZONE,1,1,nil,tp)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if not tc:IsRelateToEffect(e) or tc:IsFacedown() then return end
	local atk=tc:GetAttack()
	local g=Duel.GetMatchingGroup(s.filter2,tp,LOCATION_MZONE,LOCATION_MZONE,tc,atk)
	for sc in aux.Next(g) do
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetValue(atk)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		sc:RegisterEffect(e1)
	end
end