Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When this card is Normal Summoned, if you have a "Laval" monster in your Graveyard other than "Laval Blaster": You can choose a number from 1 to 5, then send that many cards from the top of your Deck to the Graveyard; this card gains 200 ATK for each "Laval" monster sent to the Graveyard to activate this effect.
--ラヴァル・ガンナー
--Laval Blaster
local s,id=GetID()
function s.initial_effect(c)
	--atkup
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetCondition(s.condition)
	e1:SetCost(s.cost)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
s.listed_series={SET_LAVAL}
function s.cfilter(c)
	return c:IsSetCard(SET_LAVAL) and c:GetCode()~=id
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_GRAVE,0,1,nil)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDiscardDeckAsCost(tp,1) end
	local ct={}
	for i=5,1,-1 do
		if Duel.IsPlayerCanDiscardDeckAsCost(tp,i) then
			table.insert(ct,i)
		end
	end
	if #ct==1 then 
		Duel.DiscardDeck(tp,ct[1],REASON_COST)
	else
		Duel.Hint(HINT_SELECTMSG,tp,aux.Stringid(id,1))
		local ac=Duel.AnnounceNumber(tp,table.unpack(ct))
		Duel.DiscardDeck(tp,ac,REASON_COST)
	end
	local g=Duel.GetOperatedGroup()
	e:SetLabel(g:FilterCount(Card.IsSetCard,nil,SET_LAVAL)*200)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsFaceup() and c:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE)
		e1:SetValue(e:GetLabel())
		c:RegisterEffect(e1)
	end
end