Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
"Elemental HERO Avian" + "Elemental HERO Sparkman" + "Elemental HERO Bubbleman" Must be Fusion Summoned. You can send 1 other card you control to the GY, then target 1 monster you control; while this card is face-up on the field, that monster cannot be destroyed by battle.
--E・HERO テンペスター
--Elemental HERO Tempest
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMix(c,true,true,21844576,20721928,79979666)
	--spsummon condition
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	e1:SetValue(aux.fuslimit)
	c:RegisterEffect(e1)
	--set target
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
s.material_setcode={SET_HERO,SET_ELEMENTAL_HERO}
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsAbleToGraveAsCost,tp,LOCATION_ONFIELD,0,1,e:GetHandler()) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,Card.IsAbleToGraveAsCost,tp,LOCATION_ONFIELD,0,1,1,e:GetHandler())
	Duel.SendtoGrave(g,REASON_COST)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) end
	if chk==0 then return Duel.IsExistingTarget(nil,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,nil,tp,LOCATION_MZONE,0,1,1,nil)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if c:IsFacedown() or not c:IsRelateToEffect(e) then return end
	if not tc:IsRelateToEffect(e) then return end
	if c==tc then
		tc:RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD,0,0)
	else
		c:SetCardTarget(tc)
	end
	if c:GetFlagEffect(id+1)==0 then
		c:RegisterFlagEffect(id+1,RESET_EVENT|RESETS_STANDARD,0,0)
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_FIELD)
		e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
		e1:SetRange(LOCATION_MZONE)
		e1:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
		e1:SetTarget(s.indtg)
		e1:SetValue(1)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e1)
	end
end
function s.indtg(e,c)
	if c==e:GetHandler() then
		return c:GetFlagEffect(id)~=0
	else
		return e:GetHandler():IsHasCardTarget(c)
	end
end