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nowadays,more and more people are accustomed to sleep late.They may be busy in working such as designers and programmers. Anyway, it has led to a significant drop of people's physical health.
So, we propose a 24-hour clock to remind people to change this bad habit.When 00:00-06:00, the hour hand walks to the black area of the dial, and overlaps with the color of the dial.The clock seems to be sleeping. Remind people to go to bed.