Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
3 "HERO" monsters After this card is Fusion Summoned, for the rest of this turn, this card's ATK becomes double its original ATK. This Fusion Summoned card can make a second and third attack during each Battle Phase. Cannot attack directly.
--V・HERO トリニティー
--Vision HERO Trinity
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMixN(c,true,true,aux.FilterBoolFunctionEx(Card.IsSetCard,SET_HERO),3)
	--summon success
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_SINGLE)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCondition(s.regcon)
	e1:SetOperation(s.regop)
	c:RegisterEffect(e1)
	--extra attack
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_EXTRA_ATTACK)
	e2:SetCondition(s.atkcon)
	e2:SetValue(2)
	c:RegisterEffect(e2)
	--cannot diratk
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetCode(EFFECT_CANNOT_DIRECT_ATTACK)
	c:RegisterEffect(e3)
end
s.listed_series={SET_HERO}
s.material_setcode=SET_HERO
function s.regcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsFusionSummoned()
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_SET_ATTACK)
	e1:SetReset(RESETS_STANDARD_DISABLE_PHASE_END)
	e1:SetValue(c:GetBaseAttack()*2)
	c:RegisterEffect(e1)
end
function s.atkcon(e)
	return e:GetHandler():IsFusionSummoned()
end