An analog clock with no hands (well not in the standard sense), rather the hands are virtual and created by the effect of UV light on photo luminescent material. Hence called an Analumi-Clock. (Analogue Luminescent Clock).
UV LED's are used to illuminate the luminous film but require some means of moving the film under the LED's to create the hands.
This is achieved by using a single stepper motor which can rotate clockwise and anti-clockwise. Fitted to the stepper motor is a CD or similar disc and to this is fixed the luminous film.
A fixed arm is at the 6 o'clock position and to this 8 LED's are attached to form one column.
As the motor rotates the luminous film moves under the arm pausing momentarily whilst the required number of LED's for the appropriate hand are switched on.
Each hand is created in turn with the appropriate angluar offset resulting in both hands coming to rest at the required positions for the analogue time being displayed.
Control is provided by a Microbit in conjunction with a RTC, servo board and bespoke logic.
The LED arm, dial and motor support are 3D printed.
Full details are available on Instructables