I wrote a short page about the snow flake project from end of 2017. On the page you will find a summary of the project and the link to the repository with all the required files.
Everything is open source, including the design files for the hardware and a base version of the firmware for the project.
You need some experience if you plan to produce your own snow flake boards, but this is a beautiful and very rewarding decoration.
Click on the following link to visit the project page:
If you have questions, miss some information or just have any feedback, feel free to add a comment below.
Have fun!