Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn: You can target 1 "Melodious" monster you control; it gains 800 ATK until your next Standby Phase (even if this card leaves the field). You can send this card to the Graveyard; Fusion Summon 1 "Melodious" Fusion Monster from your Extra Deck, using monsters you control as Fusion Materials.
--フォルテッシモ
--Fortissimo
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--atkup
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_ATKCHANGE)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCountLimit(1)
	e2:SetTarget(s.atktg)
	e2:SetOperation(s.atkop)
	c:RegisterEffect(e2)
	--fusion summon
	local params={aux.FilterBoolFunction(Card.IsSetCard,SET_MELODIOUS),Fusion.OnFieldMat}
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_FUSION_SUMMON)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_SZONE)
	e3:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E)
	e3:SetCost(Cost.SelfToGrave)
	e3:SetTarget(Fusion.SummonEffTG(table.unpack(params)))
	e3:SetOperation(Fusion.SummonEffOP(table.unpack(params)))
	c:RegisterEffect(e3)
end
s.listed_series={SET_MELODIOUS}
function s.atkfilter(c)
	return c:IsFaceup() and c:IsSetCard(SET_MELODIOUS)
end
function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.atkfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.atkfilter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	local g=Duel.SelectTarget(tp,s.atkfilter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_ATKCHANGE,g,1,0,800)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsFaceup() and tc:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_STANDBY|RESET_SELF_TURN)
		e1:SetValue(800)
		tc:RegisterEffect(e1)
	end
end