Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When a face-up LIGHT Dragon-Type monster you control is targeted for an attack: The attack target gains ATK equal to the attacking monster's ATK, until the end of the Damage Step.
--反射光子流
--Photon Current
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_BE_BATTLE_TARGET)
	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 a=Duel.GetAttacker()
	local d=Duel.GetAttackTarget()
	return a:IsOnField() and d and d:IsFaceup() and d:IsControler(tp) and d:IsAttribute(ATTRIBUTE_LIGHT) and d:IsRace(RACE_DRAGON)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.GetAttacker():CreateEffectRelation(e)
	Duel.GetAttackTarget():CreateEffectRelation(e)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local a=Duel.GetAttacker()
	local d=Duel.GetAttackTarget()
	if a:IsFacedown() or not a:IsRelateToEffect(e) or d:IsFacedown() or not d:IsRelateToEffect(e) then return end
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(a:GetAttack())
	e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_DAMAGE)
	d:RegisterEffect(e1)
end