Abstract art is any art that does not accurately represent objects, humans, or animals, but rather portrays its subject matter in a conceptual or abstract manner using geometric shapes, lines, and colors. There are several styles of abstract art including abstract expressionism, action painting, color field, cubism, and neoplasticism. Cubism represents objects using geometric forms like spheres, cones and cylinders, while neoplasticism uses only vertical and horizontal lines and primary colors.