Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn: You can declare a Level from 1 to 8; this card becomes that Level until the end of this turn. You can only control 1 "Gagaga Magician". Cannot be used as a Synchro Material.
--ガガガマジシャン
--Gagaga Magician
local s,id=GetID()
function s.initial_effect(c)
	c:SetUniqueOnField(1,0,id)
	--lv change
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_MZONE)
	e1:SetTarget(s.tg)
	e1:SetOperation(s.op)
	c:RegisterEffect(e1)
	--unsynchroable
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_CANNOT_BE_SYNCHRO_MATERIAL)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e2:SetValue(1)
	c:RegisterEffect(e2)
end
function s.tg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local lv=e:GetHandler():GetLevel()
	Duel.Hint(HINT_SELECTMSG,tp,aux.Stringid(id,1))
	e:SetLabel(Duel.AnnounceLevel(tp,1,8,lv))
end
function s.op(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsFaceup() and c:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_CHANGE_LEVEL)
		e1:SetValue(e:GetLabel())
		e1:SetReset(RESETS_STANDARD_DISABLE_PHASE_END)
		c:RegisterEffect(e1)
	end
end