Paul Klee was an artist who used cubism, surrealism, and expressionism in his art. Though he didn’t focus mainly on one theme when producing his work, he implemented color theory in his artwork, and because he admired children’s artwork, aimed to incorporate similar styles. He never tried to make his art complicated, and because he was a musician himself, he also on occasion would visually represent music with his art. He often used symbols in his creations, such as geometric symbols or musical symbols.