Hi Jessie
Happy for getting your mail.
The design of watch face need to use an application tool. (You can download it from this link--> http://developer.garmin.com/connect-iq/download/#download )
I feel that is hard, but my coworker told me if someone know the JAVA it will be very easy to design.
Our engineer is developing a new mobile app for design the watch face, if it finished it will be launched on Apple store. (I can use that app to create a 88RC watch face, but just very simple.)