https://apps.garmin.com/en-US/apps/a492ab4f-8917-4a73-9efe-fac2bd39f71b#0
As the title of the watch face implies, this is an attempt to simulate retro style flip clocks which I decided to do for the heck of it on a boring Sunday. This is a one off thing so I most probably won't be working to improve it though you're more than free to take the idea and improve on it or create something new.
The display is self-explanatory, except the bottom percentage thing. That’s the battery power. Unfortunately, the dark gray of the flip pieces are the darkest the Garmin SDK gets.
Oh, and this only works for the Vivoactive HR.
Source code is available to those who want it. Just PM me for it.