Now this one was interesting....
"Create a stain on a clean sketchbook page using anything!
Use the stain to create a image with your pencil!"
Use the stain to create a image with your pencil!"
The first thing I thought of was coffee!
So I took some coffee grounds, spread them on the page and rubbed them in a bit to make a good stain.
Well what do you know, I came up with a tree haha!
I just love trees and apparently so does my subconscious.