Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is Normal or Special Summoned: You can target 1 "Photon" or "Galaxy" monster in your GY, except "Galaxy Summoner"; Special Summon it in Defense Position. You can target 1 other LIGHT monster you control; it becomes Level 4 until the end of this turn. You can only use each effect of "Galaxy Summoner" once per turn.
--銀河の召喚師
--Galaxy Summoner
--Scripted by Hatter
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon 1 "Photon" or "Galaxy" monster
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
	--Change the level of 1 other LIGHT monster to 4
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_LVCHANGE)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,{id,1})
	e3:SetTarget(s.lvtg)
	e3:SetOperation(s.lvop)
	c:RegisterEffect(e3)
end
s.listed_names={id}
s.listed_series={SET_PHOTON,SET_GALAXY}
function s.spfilter(c,e,tp)
	return c:IsSetCard({SET_PHOTON,SET_GALAXY}) 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,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_GRAVE) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP_DEFENSE)
	end
end
function s.lvfilter(c)
	return c:IsFaceup() and c:IsAttribute(ATTRIBUTE_LIGHT) and c:HasLevel() and not c:IsLevel(4)
end
function s.lvtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local c=e:GetHandler()
	if chkc then return c~=chkc and chkc:IsControler(tp) and chkc:IsLocation(LOCATION_MZONE) and s.lvfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.lvfilter,tp,LOCATION_MZONE,0,1,c) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,s.lvfilter,tp,LOCATION_MZONE,0,1,1,c)
end
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		--Change level
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_CHANGE_LEVEL)
		e1:SetValue(4)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		tc:RegisterEffect(e1)
	end
end