Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
All monsters you control gain 200 ATK during your Battle Phase only.
--勇気の旗印
--Banner of Courage
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)
	--Atk up
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetCode(EFFECT_UPDATE_ATTACK)
	e2:SetCondition(s.con)
	e2:SetValue(200)
	c:RegisterEffect(e2)
end
function s.con(e)
	return Duel.IsTurnPlayer(e:GetHandlerPlayer()) and Duel.IsBattlePhase()
end