quest xmas_boom begin
    state start begin
        when login begin
            local hour = tonumber(os.date("%H"))
            local xmas_boom = game.get_event_flag("xmas_boom")
            if hour >= 7 and hour <= 22 then
                if xmas_boom == 1 then
                    game.set_event_flag("xmas_boom", 0)
                end
            else
                if xmas_boom == 0 then
                    game.set_event_flag("xmas_boom", 1)
                end
            end
        end
    end
end