Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
A player cannot attack face-down monsters during this turn.
--陽動作戦
--A Feint Plan
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)
	e1:SetHintTiming(0,TIMING_BATTLE_START)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CANNOT_SELECT_BATTLE_TARGET)
	e1:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
	e1:SetValue(s.atlimit)
	e1:SetReset(RESET_PHASE|PHASE_END,1)
	Duel.RegisterEffect(e1,tp)
end
function s.atlimit(e,c)
	return c:IsFacedown()
end