The Fibonacci Circles collection shows arrangements of circles whose diameters correspond to the Fibonacci numbers. The diameter of a single circle is therefore the sum of the diameters of the next two smaller circles. The colored areas grow with the square of the Fibonacci numbers.
In this Fibonacci Circles image, the circles are in loose order by size, but freely arranged. Depending on how it is hung, a longer viewing creates a three-dimensional effect reminiscent of a swarm of recently launched balloons.