A simple exercise that has always a great success, is the painting of a silhouette that stands out against a background painted in gradation. In this case we have created a tonal gradation with acrylic paint, starting from white color and gradually adding small amounts of another color. The painting of the background is done quickly with a flat brush, before the colors dry. In this way you can mix a shade in the other while painting is still damp. The black figure was traced on the painted background with tracing paper and then colored with black painting.