- "First, calculate the orbital radius. To do this accurately, measure the average diameter of each planet, p, and the average distance from the center of the image to the outer edge of the planets, x, and calculate the orbital radius r = x - p"
- "Next, write a unit test script that we will run that reads the rendered page and confirms that each planet is on the orbital radius. If a planet is not, output the difference you must shift it by to make the test pass. Use this feedback until all planets are perfectly aligned."