How to Do a Variable With Line Using Circles

CNN's John Sutter has been working on a project called Excalidra, an open-source design tool. He wanted to learn more about the tools that let him create perfect freehand shapes. So he turned to apps like GoodNotes and globs.design for help in learning how they work. They're two different kinds of primitives: one is a vector network; another is a primitive curve.