Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During the Damage Step, if an opponent's monster attacks your monster: Target 1 other face-up monster you control; your attacked monster gains ATK equal to that target's ATK, during the Damage Step only.
--援護射撃
--Covering Fire
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE)
	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(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	local bc=Duel.GetAttackTarget()
	return Duel.IsPhase(PHASE_DAMAGE) and not Duel.IsDamageCalculated() and bc and bc:IsControler(tp) and bc:IsFaceup()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local bc=Duel.GetAttackTarget()
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and chkc:HasNonZeroAttack() and chkc~=bc end
	if chk==0 then return Duel.IsExistingTarget(Card.HasNonZeroAttack,tp,LOCATION_MZONE,0,1,bc) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,Card.HasNonZeroAttack,tp,LOCATION_MZONE,0,1,1,bc)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	local bc=Duel.GetAttackTarget()
	if bc:IsFaceup() and bc:IsRelateToBattle() and tc:IsRelateToEffect(e) and tc:IsFaceup() and tc:IsControler(tp) then
		--The attacked monster gains ATK equal to that target's ATK, during the Damage Step only
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(tc:GetAttack())
		e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_DAMAGE_CAL)
		bc:RegisterEffect(e1)
	end
end