Here we introduce JavaScript variables and system variables in p5.js.
This video follows on from part 1 here:
• p5.js - part 1: Introduction to p5.js - so...
You might also want to watch The Coding Train introduction to p5js here before watching this:
• Start learning here!
If you want to see the code for the eyeballs it's here:
https://amcc.github.io/p5js-eyeballs/