Rearrange the tiles by tapping a tile adjacent to the blank space like the classic sliding puzzles.
Tapping tiles that are not next to the blank space will cycle their colour.
Once you are happy with the tile layout and/or colours you can prevent accidental taps from causing changes using the toggle switches on the 'My Clock' settings page in the Fitbit app.
12/24hr clock preference is set from your Fitbit account settings.
https://www.fitbit.com/user/profile/edit
After a FREE 3 hour trial you may choose to unlock the clock for $1.50 here https://k-pay.io/code/slidingpuzzle to continue using it. Thank you for your support, I couldn't keep doing this without your generosity! đ
Please check out my other clock faces:
https://gallery.fitbit.com/developer/efd0864c-b784-410c-909d-99bf5055a795