The first five numbers in the Fibonacci sequence are 1, 1, 2, 3, and 5. Each square on the clock represents one of these numbers—the side lengths of each square match these numbers.

The Fibonacci sequence is a set of steadily increasing numbers where each number is equal to the sum of the preceding two numbers.

And the sequence of monthly totals that got us there will have looked like this: The first 12 terms of the Fibonacci sequence (starting at one, not zero).