Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card battles an opponent's monster, during damage calculation (in either player's turn): You can activate this effect once per battle; your opponent takes no battle damage for the rest of this turn, also send 1 "Deskbot" monster from your Deck to the Graveyard, except "Deskbot 004", and if you do, this card gains ATK and DEF equal to the sent monster's Level x 500, during damage calculation only. If this card destroys an opponent's monster by battle: You can Special Summon 2 "Deskbot" monsters with different Levels from your hand and/or Graveyard in Defense Position.
--ブンボーグ004
--Deskbot 004
local s,id=GetID()
function s.initial_effect(c)
	--atk/def up
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_TOGRAVE+CATEGORY_ATKCHANGE+CATEGORY_DEFCHANGE)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_PRE_DAMAGE_CALCULATE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--spsummon
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_BATTLE_DESTROYING)
	e2:SetCondition(aux.bdocon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_DESKBOT}
s.listed_names={id}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetBattleTarget()~=nil
end
function s.tgfilter(c)
	return c:IsSetCard(SET_DESKBOT) and c:IsMonster() and not c:IsCode(id) and c:IsAbleToGrave()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():GetFlagEffect(id)==0
		and Duel.IsExistingMatchingCard(s.tgfilter,tp,LOCATION_DECK,0,1,nil) end
	e:GetHandler():RegisterFlagEffect(id,RESET_CHAIN,0,1)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,tp,LOCATION_DECK)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.tgfilter,tp,LOCATION_DECK,0,1,1,nil)
	local tc=g:GetFirst()
	if tc and Duel.SendtoGrave(tc,REASON_EFFECT)~=0 and tc:IsLocation(LOCATION_GRAVE)
		and c:IsRelateToBattle() and c:IsFaceup() then
		local lv=tc:GetLevel()
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(lv*500)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_DAMAGE_CAL)
		c:RegisterEffect(e1)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_UPDATE_DEFENSE)
		c:RegisterEffect(e2)
	end
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD)
	e3:SetCode(EFFECT_AVOID_BATTLE_DAMAGE)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET+EFFECT_FLAG_CLIENT_HINT)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetTargetRange(0,1)
	e3:SetValue(1)
	e3:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e3,tp)
end
function s.spfilter1(c,e,tp)
	return c:IsSetCard(SET_DESKBOT) and c:IsMonster()
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
		and Duel.IsExistingMatchingCard(s.spfilter2,tp,LOCATION_GRAVE|LOCATION_HAND,0,1,c,e,tp,c:GetLevel())
end
function s.spfilter2(c,e,tp,lv)
	return c:IsSetCard(SET_DESKBOT) and c:IsMonster() and c:GetLevel()~=lv
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return not Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT)
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>1
		and Duel.IsExistingMatchingCard(s.spfilter1,tp,LOCATION_GRAVE|LOCATION_HAND,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,2,tp,LOCATION_GRAVE|LOCATION_HAND)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) then return end
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<2 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g1=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter1),tp,LOCATION_GRAVE|LOCATION_HAND,0,1,1,nil,e,tp)
	if #g1>0 then
		local tc=g1:GetFirst()
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g2=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter2),tp,LOCATION_GRAVE|LOCATION_HAND,0,1,1,tc,e,tp,tc:GetLevel())
		g1:Merge(g2)
		Duel.SpecialSummon(g1,0,tp,tp,false,false,POS_FACEUP_DEFENSE)
	end
end