Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If you have no monsters in your GY, you can Special Summon this card (from your hand). You can send 1 of your Equip Spells equipped to this card to the GY, then target up to 3 monsters in your opponent's GY; banish those targets, and if you do, this card gains 500 ATK for each monster banished by this effect, until the end of this turn.
--ガーディアン・エアトス
--Guardian Eatos
local s,id=GetID()
function s.initial_effect(c)
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.spcon)
	c:RegisterEffect(e1)
	--remove
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_REMOVE)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCost(s.rmcost)
	e2:SetTarget(s.rmtg)
	e2:SetOperation(s.rmop)
	c:RegisterEffect(e2)
end
function s.spcon(e,c)
	if c==nil then return true end
	return Duel.GetLocationCount(c:GetControler(),LOCATION_MZONE)>0
		and not Duel.IsExistingMatchingCard(Card.IsMonster,c:GetControler(),LOCATION_GRAVE,0,1,nil)
end
function s.cfilter(c)
	return c:IsSpell() and c:IsAbleToGraveAsCost()
end
function s.rmcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():GetEquipGroup():IsExists(s.cfilter,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=e:GetHandler():GetEquipGroup():FilterSelect(tp,s.cfilter,1,1,nil)
	Duel.SendtoGrave(g,REASON_COST)
end
function s.rmfilter(c)
	return c:IsMonster() and c:IsAbleToRemove() and aux.SpElimFilter(c)
end
function s.rmtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE|LOCATION_GRAVE) and chkc:IsControler(1-tp) and s.rmfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.rmfilter,tp,0,LOCATION_MZONE|LOCATION_GRAVE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
	local g=Duel.SelectTarget(tp,s.rmfilter,tp,0,LOCATION_MZONE|LOCATION_GRAVE,1,3,nil)
	Duel.SetOperationInfo(0,CATEGORY_REMOVE,g,#g,0,0)
end
function s.rmop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	local ct=Duel.Remove(g,POS_FACEUP,REASON_EFFECT)
	local c=e:GetHandler()
	if ct>0 and c:IsFaceup() and c:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(ct*500)
		e1:SetReset(RESETS_STANDARD_DISABLE_PHASE_END)
		c:RegisterEffect(e1)
	end
end