I created the Geneva mechanism using Tinkercad Codeblocks. By changing the slots value in the "initialization" template, you can freely adjust the number of slots.

Movie: https://www.youtube.com/shorts/Ud-0BkLBQJY

Tinkercad: https://www.tinkercad.com/codeblocks/bJDl1VqaENx-n-slots-geneva-drivecodeblocks

I have prepared detailed instructions at the following link: https://champierre.github.io/geneva-drive-en/