Uploaded the model to show how I extended a 3d printed clock with a stepper motor. Its meant to be attached to this model:

[https://www.printables.com/model/69291-mechanical-wall-clock/](https://www.printables.com/model/69291-mechanical-wall-clock/)

And if you have problems with the electronics, I've followed : [https://maker.pro/arduino/tutorial/how-to-control-a-stepper-motor](https://maker.pro/arduino/tutorial/how-to-control-a-stepper-motor)