The arcs indicate each 15 minutes out of one hour.

The battery percentage indicates seconds out of 60 seconds.

The 12 bars represent 12 hours.

When it reaches midnight, the home button will become yellow. So it’s time for sleep haha:P

When it’s during the day(6AM-6PM),the sun image will be displayed at the centre of the screen. Otherwise a moon image will be displayed.

https://www.openprocessing.org/sketch/609463