Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Face-up Normal Monsters on the field are unaffected by your opponent's Spell Cards. This card is destroyed during your second Standby Phase after activation.
--砂塵の結界
--Dust Barrier
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	c:RegisterEffect(e1)
	--immune
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_IMMUNE_EFFECT)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
	e2:SetTarget(aux.TargetBoolFunction(Card.IsType,TYPE_NORMAL))
	e2:SetValue(s.efilter)
	c:RegisterEffect(e2)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local c=e:GetHandler()
	c:SetTurnCounter(0)
	--destroy
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_SZONE)
	e1:SetCondition(s.descon)
	e1:SetOperation(s.desop)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_STANDBY|RESET_SELF_TURN,2)
	c:RegisterEffect(e1)
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	return tp==Duel.GetTurnPlayer()
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local ct=c:GetTurnCounter()
	ct=ct+1
	c:SetTurnCounter(ct)
	if ct==2 then
		Duel.Destroy(c,REASON_EFFECT)
	end
end
function s.efilter(e,re)
	return e:GetHandlerPlayer()~=re:GetOwnerPlayer() and re:IsSpellEffect()
end