Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Special Summoned from the hand or Deck. Once per turn: You can discard 1 card and pay 1000 Life Points; this card gains 1000 ATK until the End Phase. When this card in your possession is destroyed by your opponent's card effect and sent to your Graveyard: Both players take damage equal to this card's ATK in the Graveyard.
--The big SATURN
--The Big Saturn
local s,id=GetID()
function s.initial_effect(c)
	--cannot special summon
	local e1=Effect.CreateEffect(c)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE+EFFECT_FLAG_SINGLE_RANGE)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetRange(LOCATION_HAND|LOCATION_DECK)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	e1:SetValue(aux.FALSE)
	c:RegisterEffect(e1)
	--atkup
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_ATKCHANGE)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1)
	e2:SetCost(s.atcost)
	e2:SetOperation(s.atop)
	c:RegisterEffect(e2)
	--damage
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DAMAGE)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e3:SetCode(EVENT_TO_GRAVE)
	e3:SetCondition(s.damcon)
	e3:SetTarget(s.damtg)
	e3:SetOperation(s.damop)
	c:RegisterEffect(e3)
end
function s.atcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckLPCost(tp,1000)
		and Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
	Duel.PayLPCost(tp,1000)
end
function s.atop(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:SetValue(1000)
		e1:SetReset(RESETS_STANDARD_DISABLE_PHASE_END)
		c:RegisterEffect(e1)
	end
end
function s.damcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return (r&(REASON_DESTROY|REASON_EFFECT))==(REASON_DESTROY|REASON_EFFECT) and rp~=tp and c:IsPreviousControler(tp)
end
function s.damtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local dam=e:GetHandler():GetAttack()
	Duel.SetTargetParam(dam)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,PLAYER_ALL,dam)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	local d=Duel.GetChainInfo(0,CHAININFO_TARGET_PARAM)
	Duel.Damage(1-tp,d,REASON_EFFECT,true)
	Duel.Damage(tp,d,REASON_EFFECT,true)
	Duel.RDComplete()
end