Here are more exercises from Keys to Drawing with Imagination.
To create these drawings, I made random marks on the paper with no preconceived notion of what I wanted to draw. I let the drawing emerge. The drawing told me what it wanted to be.
The first drawing below wanted to be trees. The second drawing wanted to be a dog on the way home from a birthday party. The last drawing wanted to be a scarecrow.
I used a light box to create the drawing at the top from the second drawing. The drawing at the top is a dog on the way home from a birthday party in the rain.