Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
1 Tuner + 1+ non-Tuner monsters If this card is Synchro Summoned, or sent to the GY: You can target 1 monster in your GY, or 1 face-up monster your opponent controls; discard 1 card, and if you do, place that monster in its owner's Spell & Trap Zone as a face-up Continuous Trap. During either player's turn, if this card is a Continuous Trap: You can Special Summon 1 face-up Monster Card from your Spell & Trap Zone. You can only use each effect of "Enigmaster Packbit" once per turn.
--エニグマスター・パックビット
--Enigmaster Packbit
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Synchro Summon procedure
	Synchro.AddProcedure(c,nil,1,1,Synchro.NonTuner(nil),1,99)
	--Place 1 monster from your GY or your opponent's field in the Spell & Trap Zone as a Continuous Trap
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_HANDES)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_TO_GRAVE)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.pltg)
	e1:SetOperation(s.plop)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetCondition(function(e) return e:GetHandler():IsSynchroSummoned() end)
	c:RegisterEffect(e2)
	--Special Summon 1 Monster Card from your Spell & Trap Zone
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_QUICK_O)
	e3:SetCode(EVENT_FREE_CHAIN)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1,{id,1})
	e3:SetHintTiming(0,TIMING_MAIN_END|TIMINGS_CHECK_MONSTER_E)
	e3:SetCondition(function(e) return e:GetHandler():IsContinuousTrap() end)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
function s.plfilter(c)
	local owner_p=c:GetOwner()
	return c:IsMonster() and c:IsFaceup() and Duel.GetLocationCount(owner_p,LOCATION_SZONE)>0 and not c:IsForbidden()
		and c:CheckUniqueOnField(owner_p)
end
function s.pltg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return s.plfilter(chkc) and ((chkc:IsControler(tp) and chkc:IsLocation(LOCATION_GRAVE))
		or (chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE))) end
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil,REASON_EFFECT)
		and Duel.IsExistingTarget(s.plfilter,tp,LOCATION_GRAVE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOFIELD)
	local tc=Duel.SelectTarget(tp,s.plfilter,tp,LOCATION_GRAVE,LOCATION_MZONE,1,1,nil):GetFirst()
	Duel.SetOperationInfo(0,CATEGORY_HANDES,nil,0,tp,1)
	if tc:IsLocation(LOCATION_GRAVE) then
		Duel.SetOperationInfo(0,CATEGORY_LEAVE_GRAVE,tc,1,tp,0)
	end
end
function s.plop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_EFFECT|REASON_DISCARD,nil,REASON_EFFECT)==0 then return end
	local tc=Duel.GetFirstTarget()
	local owner_p=tc:GetOwner()
	if not tc:IsRelateToEffect(e) or tc:IsImmuneToEffect(e) then return end
	if Duel.GetLocationCount(owner_p,LOCATION_SZONE)==0 then
		Duel.SendtoGrave(tc,REASON_RULE,nil,PLAYER_NONE)
	elseif tc:CheckUniqueOnField(owner_p) and Duel.MoveToField(tc,tp,owner_p,LOCATION_SZONE,POS_FACEUP,tc:IsMonsterCard()) then
		--Treated as a Continuous Trap
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_CHANGE_TYPE)
		e1:SetValue(TYPE_TRAP|TYPE_CONTINUOUS)
		e1:SetReset((RESET_EVENT|RESETS_STANDARD)&~RESET_TURN_SET)
		tc:RegisterEffect(e1)
	end
end
function s.spfilter(c,e,tp)
	return c:IsFaceup() and c:IsOriginalType(TYPE_MONSTER) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_STZONE,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_STZONE)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_STZONE,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end