What's the easiest and quickest way to have a p5 sketch re-start from where it last left off? Local Storage!
- MDN web docs entry on Window.localStorage 
- p5 reference entry on the storeItem() method 
- p5 reference entry on the getItem() method 
- Article on options for storing data in the browser 
- Coding Train video on object-oriented programming in p5.js 
- Editingby Mathieu Blanchette 
- Animationsby Jason Heglund