Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 4 monsters Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 face-up Attack Position monster your opponent controls, whose current ATK is different from its original ATK; destroy it, and if you do, draw 1 card.
--No.103 神葬零嬢ラグナ・ゼロ
--Number 103: Ragnazero
local s,id=GetID()
function s.initial_effect(c)
	--Xyz Summon
	Xyz.AddProcedure(c,nil,4,2)
	c:EnableReviveLimit()
	--Destroy 1 monster whose current ATK is different from its original ATK
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY+CATEGORY_DRAW)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(Cost.DetachFromSelf(1,1,nil))
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E)
	c:RegisterEffect(e1)
end
s.xyz_number=103
function s.filter(c,e)
	return c:IsPosition(POS_FACEUP_ATTACK) and c:GetAttack()~=c:GetBaseAttack()
		and c:IsCanBeEffectTarget(e)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE) and s.filter(chkc,e) end
	if chk==0 then
		--retain applicable targets in case cost makes an indirect change to ATK
		local g=Duel.GetMatchingGroup(s.filter,tp,0,LOCATION_MZONE,nil,e)
		if #g==0 or not Duel.IsPlayerCanDraw(tp,1) then return end
		g:KeepAlive()
		e:SetLabelObject(g)
		return true
	end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=e:GetLabelObject()
	local sg=g:Select(tp,1,1,nil)
	Duel.SetTargetCard(sg)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,sg,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,1)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not tc then return end
	if tc:IsRelateToEffect(e) and Duel.Destroy(tc,REASON_EFFECT)~=0 then
		Duel.Draw(tp,1,REASON_EFFECT)
	end
end