Simon explains why he slightly changed Daniel Shiffman’s Lorenz Attractor Coding Challenge: Simon used four variables instead of 11.

The **Lorenz system** is a system of ordinary differential equations, first studied by Edward Lorenz. The **Lorenz attractor** is a set of chaotic solutions of the Lorenz system which, when plotted, resemble a butterfly or figure eight.

In the next video, Simon’s completed version of the challenge, including rainbow colors: