Three circles stands for (from the top): hour, minutes and seconds. On the left side there is time or date, on the right – complications. As time is spins to eternity, here you can see its mark.

> Go to settings to set color preset and turn on complications. You can switch on the hour chimes. Chimes (an option) discreetly notify of the passing of every full hour with a long vibration > Tap complications to change them.