Creating a visual in p5.js

For my visual, I had created a circles within another moving across the y and x axis while the circles are changing colors. I had used ellipses and then I had sized them to the way I wanted them to be. I also used some variables to create the colors within the circles and to also get the circles to move as well. I had a challenge with getting my circles to reappear after they had left the page. Overall the coding this sketch was not bad but I wish I had done more to it. https://editor.p5js.org/cfequiere@marymountnyc.org/sketches/rJ7Arju67