Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 face-up Spell Card you control; place 1 counter on it. If it would ever be destroyed, remove the counter instead.
--マジック・ガードナー
--Magic Reflector
local s,id=GetID()
function s.initial_effect(c)
	--destroy rep
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_COUNTER)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetTarget(s.addct)
	e1:SetOperation(s.addc)
	c:RegisterEffect(e1)
end
function s.filter(c)
	return c:IsFaceup() and c:IsSpell()
end
function s.addct(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_SZONE) and chkc:IsControler(tp) and s.filter(chkc) and chkc~=e:GetHandler() end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_SZONE,0,1,e:GetHandler()) end
	Duel.Hint(HINT_SELECTMSG,tp,aux.Stringid(id,0))
	Duel.SelectTarget(tp,s.filter,tp,LOCATION_SZONE,0,1,1,e:GetHandler())
end
function s.addc(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) then
		tc:AddCounter(0x102a,1)
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
		e1:SetCode(EFFECT_DESTROY_REPLACE)
		e1:SetTarget(s.reptg)
		e1:SetOperation(s.repop)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1)
	end
end
function s.reptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return (r&REASON_REPLACE+REASON_RULE)==0
		and e:GetHandler():GetCounter(0x102a)>0 end
	return true
end
function s.repop(e,tp,eg,ep,ev,re,r,rp,chk)
	e:GetHandler():RemoveCounter(tp,0x102a,1,REASON_EFFECT)
end