I blotted some transparent earth colors on a wet sheet of watercolor paper. I had previously folded and creased the paper in different places. I then drew several sets of partial circles. The arcs were actually scratches made by a divider, a compass-like device with two sharp points, instead of steel point and a pencil point. I made them visible by introducing ink into the minute crevices with a small brush.
Finally, I splotched some pools of Prussian blue and quinacridone nickel at intervals along the paper, and joined them. I enjoy the colors they make when combined.