Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can Ritual Summon this card with "Chaos Form". Must be Ritual Summoned. Your opponent cannot target this card with card effects, also it cannot be destroyed by your opponent's card effects. If this card attacks a Defense Position monster, inflict double piercing battle damage.
--ブルーアイズ・カオス・MAX・ドラゴン
--Blue-Eyes Chaos MAX Dragon
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--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.ritlimit)
	c:RegisterEffect(e1)
	--cannot target
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCode(EFFECT_CANNOT_BE_EFFECT_TARGET)
	e2:SetValue(aux.tgoval)
	c:RegisterEffect(e2)
	--indes
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e3:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e3:SetRange(LOCATION_MZONE)
	e3:SetValue(s.indval)
	c:RegisterEffect(e3)
	--pierce
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_SINGLE)
	e4:SetCode(EFFECT_PIERCE)
	e4:SetValue(DOUBLE_DAMAGE)
	c:RegisterEffect(e4)
end
s.listed_names={21082832}
function s.indval(e,re,tp)
	return tp~=e:GetHandlerPlayer()
end