Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When an opponent's monster declares an attack on a "Blackwing" monster you control: Banish all face-up Attack Position monsters your opponent controls. If you control exactly 3 "Blackwing" monsters (and no other monsters), you can activate this card from your hand.
--ブラック・ソニック
--Black Sonic
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_REMOVE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--Can be activated from the hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_TRAP_ACT_IN_HAND)
	e2:SetCondition(s.handcon)
	c:RegisterEffect(e2)
end
s.listed_series={SET_BLACKWING}
function s.handcon(e)
	local g=Duel.GetFieldGroup(e:GetHandlerPlayer(),LOCATION_MZONE,0)
	return #g==3 and g:IsExists(aux.FaceupFilter(Card.IsSetCard,SET_BLACKWING),3,nil)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetAttackTarget()
	return tc and tc:IsFaceup() and tc:IsControler(tp) and tc:IsSetCard(SET_BLACKWING)
end
function s.filter(c)
	return c:IsPosition(POS_FACEUP_ATTACK) and c:IsAbleToRemove()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,0,LOCATION_MZONE,1,nil) end
	local g=Duel.GetMatchingGroup(s.filter,tp,0,LOCATION_MZONE,nil)
	Duel.SetOperationInfo(0,CATEGORY_REMOVE,g,#g,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.filter,tp,0,LOCATION_MZONE,nil)
	if #g>0 then
		Duel.Remove(g,POS_FACEUP,REASON_EFFECT)
	end
end