There will be two exercises for you to practice on:
1) the coordinates exercise
2) the recursive tree exercise
In the second exercise we will advance our understanding of p5.js with coordinate system transformations, animations and randomness. The example used for this exercise was developed by D. Shiffman as part of the "Coding Train" series.
For more examples on the topic have a look at The Nature of Code book, which you can read online.