Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
3 Level 1 monsters If this face-up card would be destroyed, you can detach 1 Xyz Material from this card instead. Level 4 or lower monsters you control cannot be destroyed by card effects.
--巨星のミラ
--Mira the Star-Bearer
local s,id=GetID()
function s.initial_effect(c)
	--xyz summon
	Xyz.AddProcedure(c,nil,1,3)
	c:EnableReviveLimit()
	--destroy replace
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetCode(EFFECT_DESTROY_REPLACE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetTarget(s.reptg)
	e1:SetOperation(s.repop)
	c:RegisterEffect(e1)
	--indes
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(s.indtg)
	e2:SetValue(1)
	c:RegisterEffect(e2)
end
function s.indtg(e,c)
	return c:IsFaceup() and c:IsLevelBelow(4)
end
function s.reptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return not c:IsReason(REASON_REPLACE) and c:CheckRemoveOverlayCard(tp,1,REASON_EFFECT) end
	return Duel.SelectEffectYesNo(tp,c,96)
end
function s.repop(e,tp,eg,ep,ev,re,r,rp)
	e:GetHandler():RemoveOverlayCard(tp,1,1,REASON_EFFECT)
end