Take an etchasketch. Add three servo motors controlled by some software.
Servo 1 wipes the screen.
Servo 2 and 3 controls the x and y axis to draw the time.
Every 58 seconds servo 1 wipes the screen and servo 2 and 3 re-writes the time.
Brilliant
Etchasketch PLUS
It integrates into your calendar via wifi and also draws your upcoming calendar appointments
Even more brilliant
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