Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent. If this face-up Attack Position card is targeted for an attack: Change it to Defense Position.
--マッド・デーモン
--Mad Archfiend
local s,id=GetID()
function s.initial_effect(c)
	--pierce
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_PIERCE)
	c:RegisterEffect(e1)
	--pos
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_POSITION)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e2:SetCode(EVENT_BE_BATTLE_TARGET)
	e2:SetTarget(s.target)
	e2:SetOperation(s.operation)
	c:RegisterEffect(e2)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsAttackPos() end
	Duel.SetOperationInfo(0,CATEGORY_POSITION,e:GetHandler(),1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and c:IsPosition(POS_FACEUP_ATTACK) then
		Duel.ChangePosition(c,POS_FACEUP_DEFENSE)
	end
end