Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can pay 1000 LP, then target 1 face-up Spell/Trap on the field; destroy it. You can only activate this effect of "Unending Nightmare" once per Chain.
--醒めない悪夢
--Unending Nightmare
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_ACTIVATE)
	e0:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e0)
	--Destroy 1 face-up Spell/Trap on the field
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetRange(LOCATION_SZONE)
	e1:SetHintTiming(0,TIMING_MAIN_END|TIMINGS_CHECK_MONSTER_E|TIMING_EQUIP)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_CHAIN)
	e1:SetCost(Cost.PayLP(1000))
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local c=e:GetHandler()
	local exc=not c:IsStatus(STATUS_EFFECT_ENABLED) and c or nil
	if chkc then return chkc:IsOnField() and chkc:IsSpellTrap() and chkc:IsFaceup() and (not exc or chkc~=exc) end
	if chk==0 then return Duel.IsExistingTarget(aux.FaceupFilter(Card.IsSpellTrap),tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,exc) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.FaceupFilter(Card.IsSpellTrap),tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,tp,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.Destroy(tc,REASON_EFFECT)
	end
end