Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Activate by selecting 2 Set Spell or Trap Cards on the field. The selected Spell or Trap Cards cannot be activated.
--心鎮壷
--Xing Zhen Hu
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:SetHintTiming(0,TIMING_END_PHASE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCode(EVENT_CHAIN_SOLVED)
	e2:SetLabelObject(e1)
	e2:SetCondition(aux.PersistentTgCon)
	e2:SetOperation(s.tgop)
	c:RegisterEffect(e2)
	--trigger
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD)
	e3:SetProperty(EFFECT_FLAG_SET_AVAILABLE)
	e3:SetCode(EFFECT_CANNOT_TRIGGER)
	e3:SetRange(LOCATION_SZONE)
	e3:SetTargetRange(LOCATION_SZONE,LOCATION_SZONE)
	e3:SetTarget(aux.PersistentTargetFilter)
	e3:SetValue(1)
	c:RegisterEffect(e3)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_SZONE) and chkc:IsFacedown() end
	if chk==0 then return Duel.IsExistingTarget(Card.IsFacedown,tp,LOCATION_SZONE,LOCATION_SZONE,2,e:GetHandler()) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEDOWN)
	Duel.SelectTarget(tp,Card.IsFacedown,tp,LOCATION_SZONE,LOCATION_SZONE,2,2,e:GetHandler())
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(re) then return end
	local g=Duel.GetChainInfo(ev,CHAININFO_TARGET_CARDS):Filter(Card.IsRelateToEffect,nil,re)
	local tc=g:GetFirst()
	for tc in aux.Next(g) do
		if tc:IsFacedown() then
			c:SetCardTarget(tc)
		end
	end
end