Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If a Beast-Type monster you control attacks a Defense Position monster, inflict piercing battle damage to your opponent. If you inflict battle damage to your opponent with this effect: Target 1 face-up monster your opponent controls; that target loses 500 ATK and DEF. (This remains even if this card leaves the field.)
--吠え猛る大地
--Roaring Earth
local s,id=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--pierce
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_PIERCE)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(aux.TargetBoolFunction(Card.IsRace,RACE_BEAST))
	c:RegisterEffect(e2)
	--atkdown
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e3:SetCode(EVENT_BATTLE_DAMAGE)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCondition(s.atkcon)
	e3:SetTarget(s.atktg)
	e3:SetOperation(s.atkop)
	c:RegisterEffect(e3)
end
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	local a=Duel.GetAttacker()
	local d=Duel.GetAttackTarget()
	return d and eg:GetFirst()==a and a:IsControler(tp) and a:IsRace(RACE_BEAST) and d:IsDefensePos()
end
function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and chkc:IsFaceup() end
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,Card.IsFaceup,tp,0,LOCATION_MZONE,1,1,nil)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if c:IsRelateToEffect(e) and tc and tc:IsRelateToEffect(e) and tc:IsFaceup() then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(-500)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_UPDATE_DEFENSE)
		tc:RegisterEffect(e2)
	end
end