Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During either player's turn, you can activate "Magical Musket" Spell/Trap Cards from your hand. If a Spell/Trap Card is activated in this card's column (except during the Damage Step): You can Special Summon 1 Level 4 or lower "Magical Musket" monster from your Deck in Defense Position, except "Magical Musketeer Starfire". You can only use this effect of "Magical Musketeer Starfire" once per turn.
--魔弾の射手 スター
--Magical Musketeer Starfire
local s,id=GetID()
function s.initial_effect(c)
	--During either player's turn, you can activate "Magical Musket" Spell/Trap Cards from your hand
	local e1a=Effect.CreateEffect(c)
	e1a:SetDescription(aux.Stringid(id,0))
	e1a:SetType(EFFECT_TYPE_FIELD)
	e1a:SetCode(EFFECT_QP_ACT_IN_NTPHAND)
	e1a:SetRange(LOCATION_MZONE)
	e1a:SetTargetRange(LOCATION_HAND,0)
	e1a:SetTarget(aux.TargetBoolFunction(Card.IsSetCard,SET_MAGICAL_MUSKET))
	c:RegisterEffect(e1a)
	local e1b=e1a:Clone()
	e1b:SetCode(EFFECT_TRAP_ACT_IN_HAND)
	c:RegisterEffect(e1b)
	--Special Summon 1 Level 4 or lower "Magical Musket" monster from your Deck in Defense Position, except "Magical Musketeer Starfire"
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_CHAINING)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_MAGICAL_MUSKET}
s.listed_names={id}
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return re:IsHasType(EFFECT_TYPE_ACTIVATE) and e:GetHandler():GetColumnGroup():IsContains(re:GetHandler())
end
function s.spfilter(c,e,tp)
	return c:IsLevelBelow(4) and c:IsSetCard(SET_MAGICAL_MUSKET) and not c:IsCode(id)
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
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_DECK,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
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_DECK,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP_DEFENSE)
	end
end