Tim Knowles works looks at processes of drawing in relation to movement without his hand.
![Weeping Willow on circular panel [100 pen], Tim Knowles](https://firebasestorage.googleapis.com/v0/b/c-lab-fe10d.appspot.com/o/userdata%2Fblogs%2Fwillowdrawing.jpg?alt=media&token=ff89e729-024b-4f36-b631-6e2d9a0ffabf)
His tree drawing series captures the branches movements influenced by environmental factors such as wind, by having pens tied to the tips of the branches.
These are captured on paper.