Daniel Eatock came to Kingston to give a lecture last week and asked a few volunteers to help with a new project. He instructed us to draw a circle that took exactly an hour. Putting the pen on the paper at the start and not lifting it off the page again until the hour was up. The task was about trying to get into a rhythm, not drawing too fast or slow. Where people sped up and slowed down is shown in the severity of the bleed of the line.
Here's my attempt and the rest can be seen here on Daniel Eatock's website