As an avid racing cyclist, pitting yourself against the clock is nothing unusual in a time trial.
So what better way to portray time than with a cyclist.
This project is an animated cyclist representing the passage of time with the cycle wheels. The rear wheel shows the hours and the front wheel shows the minutes.
This will be accomplished using a combination of 3d printing and manual machining.
The microcontroller, RTC, servos and build details can be found on Instructables.
https://www.instructables.com/Against-the-Clock-Revisited/