When I was in the seventh grade Mrs Shaver was added to the faculty as an art teacher. We were all asked to do a water color picture, so I picked a theme of interest to me. (My art talent is zero.) It was a dry farm (no irrigation) out in the desert showing the farmhouse with a mountain in the background, and in the foreground was a windmill like some farmers used for pumping water from the well. I was surprised when the teacher asked me to explain my picture to her, but was astonished when I was asked to show it to the class. They asked me, "What are those streaks from the top of the windmill to the farmhouse?"