There is a mathematical concept called an attractor, which is a state (or a set of numbers) that a dynamical system will eventually end up in, no matter how it starts. There are many kinds of attractors; the one used in this print is called a 'de Jong' attractor, named after Peter de Jong who originally published it in 1987. In each image, hundreds of particles move overt time according to a 4-dimensional mathematical function. By changing the parameters of the function, different shapes emerge.