Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn, if this card attacks and your opponent controls a monster at the end of the Damage Step: You can discard 1 card; this card can attack an opponent's monster once again during this Battle Phase.
--ブレード・バウンサー
--Blade Bounzer
local s,id=GetID()
function s.initial_effect(c)
	--chain attack
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCountLimit(1)
	e1:SetCode(EVENT_DAMAGE_STEP_END)
	e1:SetCondition(s.atcon)
	e1:SetCost(s.atcost)
	e1:SetOperation(s.atop)
	c:RegisterEffect(e1)
end
function s.atcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler()==Duel.GetAttacker() and e:GetHandler():CanChainAttack(2,true)
		and Duel.GetFieldGroupCount(tp,0,LOCATION_MZONE)~=0
end
function s.atcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
end
function s.atop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToBattle() then return end
	Duel.ChainAttack()
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_CANNOT_DIRECT_ATTACK)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_BATTLE)
	c:RegisterEffect(e1)
end