Franz Kline was an American abstract expressionist painter known for his black and white paintings influenced by Japanese calligraphy. He began his career painting American scenes but transitioned to abstraction by projecting drawings onto walls. Robert Motherwell was also an abstract expressionist who created a series called "Elegies to the Spanish Republic" in response to the Spanish Civil War using black and white shapes and colors inspired by Picasso's Guernica. Clyfford Still painted large-scale abstract works in earth tones that evoked geological phenomena and the sublime landscapes of the Hudson River School.