Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
A Synchro Monster that used this card as a Synchro Material gains 300 ATK.
--フレア・リゾネーター
--Flare Resonator
local s,id=GetID()
function s.initial_effect(c)
	--atkup
	local e1=Effect.CreateEffect(c)
	e1:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e1:SetCode(EVENT_BE_MATERIAL)
	e1:SetCondition(s.atkcon)
	e1:SetOperation(s.atkop)
	c:RegisterEffect(e1)
end
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	return r==REASON_SYNCHRO
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local sync=c:GetReasonCard()
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(300)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	sync:RegisterEffect(e1)
end