Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
At the start of the Damage Step, if your "P.U.N.K." monster battles an opponent's monster: You can destroy that opponent's monster. You can only use this effect of "Gagaku-P.U.N.K. Wild Picking" once per turn. If this card in its owner's Spell & Trap Zone is destroyed by an opponent's card effect: You can activate this effect; "P.U.N.K." monsters you currently control cannot be destroyed by battle this turn.
--ガガク－パンクワイルド・ピッキング
--Gagaku-P.U.N.K. Wild Picking
--scripted by Rundas
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)
	--Pop on attack
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_DESTROY)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_BATTLE_START)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.descon)
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
	--Protect
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_DESTROYED)
	e3:SetCondition(s.pcon)
	e3:SetOperation(s.pop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_PUNK}
--Pop on attack
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	local a,at=Duel.GetAttacker(),Duel.GetAttackTarget()
	if a:IsControler(1-tp) then a,at=at,a end
	return a and at and a:IsSetCard(SET_PUNK) and a:IsFaceup() and at:IsControler(1-tp)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local a,at=Duel.GetAttacker(),Duel.GetAttackTarget()
	if a:IsControler(1-tp) then a,at=at,a end
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,at,1,1-tp,LOCATION_MZONE)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	local a,at=Duel.GetAttacker(),Duel.GetAttackTarget()
	if a:IsControler(1-tp) then a,at=at,a end
	if at and at:IsRelateToBattle() and at:IsControler(1-tp) then
		Duel.Destroy(at,REASON_EFFECT)
	end
end
--Protect
function s.pcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return rp==1-tp and c:IsReason(REASON_EFFECT) and c:IsPreviousControler(tp)
		and c:IsPreviousLocation(LOCATION_SZONE)
end
function s.pop(e,tp,eg,ep,ev,re,r,rp)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e1:SetTargetRange(LOCATION_MZONE,0)
	e1:SetTarget(aux.TargetBoolFunction(Card.IsSetCard,SET_PUNK))
	e1:SetValue(1)
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
end