Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 4 monsters Once per turn, when this card destroys an opponent's monster by battle and sends it to the Graveyard: You can detach 1 Xyz Material from this card; it can can make a second attack in a row.
--カチコチドラゴン
--Kachi Kochi Dragon
local s,id=GetID()
function s.initial_effect(c)
	--xyz summon
	Xyz.AddProcedure(c,nil,4,2)
	c:EnableReviveLimit()
	--chain attack
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_BATTLE_DESTROYING)
	e1:SetCountLimit(1)
	e1:SetCondition(s.atcon)
	e1:SetCost(Cost.DetachFromSelf(1))
	e1:SetOperation(s.atop)
	c:RegisterEffect(e1)
end
function s.atcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local bc=c:GetBattleTarget()
	return bc:IsLocation(LOCATION_GRAVE) and bc:IsMonster() and c:CanChainAttack() and c:IsStatus(STATUS_OPPO_BATTLE)
end
function s.atop(e,tp,eg,ep,ev,re,r,rp)
	Duel.ChainAttack()
end