Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn: You can change the Attribute of this card.
--錬金生物 ホムンクルス
--Homunculus the Alchemic Being
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetOperation(s.attop)
	c:RegisterEffect(e1)
end
function s.attop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsFaceup() and c:IsRelateToEffect(e) then
		local att=c:AnnounceAnotherAttribute(tp)
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_COPY_INHERIT)
		e1:SetCode(EFFECT_CHANGE_ATTRIBUTE)
		e1:SetValue(att)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE)
		c:RegisterEffect(e1)
	end
end