Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Neither player can destroy Set Spell and Trap Cards on the field until your opponent's next End Phase.
--おくびょうかぜ
--Timidity
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:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	--indestructable
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e1:SetTargetRange(LOCATION_SZONE,LOCATION_SZONE)
	e1:SetProperty(EFFECT_FLAG_SET_AVAILABLE)
	e1:SetTarget(s.infilter)
	e1:SetValue(1)
	e1:SetReset(RESET_PHASE|PHASE_END,2)
	Duel.RegisterEffect(e1,tp)
end
function s.infilter(e,c)
	return c:IsFacedown()
end