The boxes in the clock has the side length as the first number of the Fibonacci series (1, 1, 2, 3, 5).
Read the current time by adding the boxes side length together.
Get the hours by adding the red & blue boxes.
Get the minutes by adding the green & blue boxes, and multiplying it with 5 (since it can only show values from 1 to 12)

Example:  (see still images)
Hour: 2+3+5 = 10
Minute: (1+5) * 5 = 30