We Love Numbers.

Screen filled with random numbers. Cursor runs every minute scanning for matching hour and minute digits.

Bluetooth - top left (0 - no connection) Vibrates on disconnection.
Battery level - top right (9 - 100/90%, 8 - 80%,.. Charging indicator)
Date - bottom left (ddmm)
Seconds - bottom right (Optional)

Options (Invert, Animations, Speed).