I have ADHD.   I try to capture the essence of it through my art.   I do not know how a typical brain processes information, but I know that I have a great deal of trouble formulating linear thoughts and organizational structure.   When I write, I typically flow in one conscious stream of thought such as this.   I have little idea what I will write when I start, nor any idea where it will go.   I have tried various ways to capture the process.  This is one session.