How it works:

There are 3 white rings on the canvas. Every ring means 15 min. When the hour begins a line starts growing from the center of the canvas and at 15, 30, 45 and 60 min it reaches a ring. Every filled line is an hour.

Bugs and other problems:

This software has not been tested on a real device, only on the emulator. There could be bugs what I didn't had on the emulator test run. If you find one then feel free to inform me about it and I will fix it.