--Twinkle Wall
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DAMAGE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	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)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return tp~=Duel.GetTurnPlayer()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local tg=Duel.GetAttacker()
	if chkc then return chkc==tg end
	if chk==0 then return tg:IsOnField() and tg:IsCanBeEffectTarget(e) end
	Duel.SetTargetCard(tg)
	local dam=tg:GetAttack()
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,tp,dam/2)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() and tc:CanAttack() then
		if Duel.NegateAttack(tc) then
			Duel.Damage(tp,tc:GetAttack()/2,REASON_EFFECT)
			local e1=Effect.CreateEffect(e:GetHandler())
			e1:SetType(EFFECT_TYPE_FIELD)
			e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
			e1:SetCode(EFFECT_CANNOT_ACTIVATE)
			e1:SetTargetRange(0,1)
			e1:SetValue(s.aclimit)
			e1:SetReset(RESET_PHASE+PHASE_END)
			Duel.RegisterEffect(e1,tp)
		end
	end
end
function s.aclimit(e,re,tp)
	return re:IsHasType(EFFECT_TYPE_ACTIVATE)
end