Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Place 1 "Centur-Ion" monster from your hand or GY in your Spell & Trap Zone as a face-up Continuous Trap. If a "Centur-Ion" Synchro Monster(s) is Special Summoned to your field, while this card is in your GY (except during the Damage Step): You can banish this card, then target 1 "Centur-Ion" monster in your GY; place it in your Spell & Trap Zone as a face-up Continuous Trap. You can only use each effect of "Centur-Ion Bonds" once per turn.
--騎士の絆
--Centur-Ion Bonds
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,{id,0})
	e1:SetHintTiming(0,TIMING_MAIN_END|TIMINGS_CHECK_MONSTER_E)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--Place 1 "Centurion" monster from your GY to your Spell & Trap Zone as a Continuous Trap
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET,EFFECT_FLAG2_CHECK_SIMULTANEOUS)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(s.plcon)
	e2:SetCost(Cost.SelfBanish)
	e2:SetTarget(s.pltg)
	e2:SetOperation(s.plop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_CENTURION}
function s.move_to_stzone(c,hc,tp)
	if not Duel.MoveToField(c,tp,tp,LOCATION_SZONE,POS_FACEUP,true) then return end
	--Treat as Continuous Trap
	local e1=Effect.CreateEffect(hc)
	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)
	c:RegisterEffect(e1)
	return true
end
function s.plfilter(c)
	return c:IsSetCard(SET_CENTURION) and c:IsMonster() and not c:IsForbidden()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	local ft=Duel.GetLocationCount(tp,LOCATION_SZONE)
	if e:GetHandler():IsLocation(LOCATION_HAND) then ft=ft-1 end
	if chk==0 then return ft>0
		and Duel.IsExistingMatchingCard(s.plfilter,tp,LOCATION_HAND|LOCATION_GRAVE,0,1,nil) end
	Duel.SetPossibleOperationInfo(0,CATEGORY_LEAVE_GRAVE,nil,1,tp,LOCATION_GRAVE)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_SZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOFIELD)
	local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.plfilter),tp,LOCATION_HAND|LOCATION_GRAVE,0,1,1,nil)
	if #g>0 then
		s.move_to_stzone(g:GetFirst(),e:GetHandler(),tp)
	end
end
function s.cfilter(c,tp)
	return c:IsFaceup() and c:IsControler(tp) and c:IsSetCard(SET_CENTURION) and c:IsType(TYPE_SYNCHRO)
end
function s.plcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil,tp)
end
function s.pltg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_GRAVE) and s.plfilter(chkc) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingTarget(s.plfilter,tp,LOCATION_GRAVE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOFIELD)
	local g=Duel.SelectTarget(tp,s.plfilter,tp,LOCATION_GRAVE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_LEAVE_GRAVE,g,1,0,0)
end
function s.plop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and Duel.GetLocationCount(tp,LOCATION_SZONE)>0 then
		s.move_to_stzone(tc,e:GetHandler(),tp)
	end
end