Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
While this card is in your hand or GY, if you control 2 or more LIGHT and/or DARK Dragon monsters: You can Special Summon this card in Defense Position, but banish it when it leaves the field. During your Main Phase: You can make all monsters you currently control become Level 8, until the end of this turn. You can only use each effect of "Galactic Spiral Dragon" once per turn.
--螺旋竜バルジ
--Galactic Spiral Dragon
--Logical Nonsense
--Substitute ID
local s,id=GetID()
function s.initial_effect(c)
	--Special summon itself from hand or GY
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND|LOCATION_GRAVE)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--Make all your monsters' level become 8
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_LVCHANGE)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,{id,1})
	e2:SetTarget(s.lvtg)
	e2:SetOperation(s.lvop)
	c:RegisterEffect(e2)
end
	--Filter for LIGHT/DARK dragons
function s.spfilter(c)
	return c:IsFaceup() and c:IsAttribute(ATTRIBUTE_LIGHT+ATTRIBUTE_DARK) and c:IsRace(RACE_DRAGON)
end
	--Check for 2+ LIGHT/DARK dragons
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_MZONE,0,2,nil)
end
	--Activation legality
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and e:GetHandler():IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,0)
end
	--Special summon from hand or GY, banish it if it leaves the field
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP_DEFENSE)>0 then
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(3300)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CLIENT_HINT)
		e1:SetCode(EFFECT_LEAVE_FIELD_REDIRECT)
		e1:SetValue(LOCATION_REMOVED)
		e1:SetReset(RESET_EVENT|RESETS_REDIRECT)
		c:RegisterEffect(e1,true)
	end
end
	--Check if has level
function s.lvfilter(c)
	return c:IsFaceup() and c:HasLevel() and not c:IsLevel(8)
end
	--Activation legality
function s.lvtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.lvfilter,tp,LOCATION_MZONE,0,1,nil) end
end
	--Make all your monsters' level become 8 until end phase
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.lvfilter,tp,LOCATION_MZONE,0,nil)
	for tc in aux.Next(g) do
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_CHANGE_LEVEL)
		e1:SetValue(8)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		tc:RegisterEffect(e1)
	end
end