For an artwork to be successful, it should have variety, emphasis, and harmony. Variety is the principle of art concerned with difference or contrast. When a certain element predominates in a design, contrasting elements can be added. Another way to add variety is by adding emphasis. Emphasis is the principle of art that makes one part of a work dominant over the other parts. A focal point is the first part of a work to attract the attention of the viewer. An artist may choose to emphasize one element of a work. He or she may also choose to emphasize a specific area of a work, creating a focal point that attracts the viewer’s attention. There are five main techniques that artists use to create focal points: contrast, isolation, location, convergence, and the unusual. Artists must also strive for harmony. Harmony is the principle of art that creates unity by stressing the similarities of separate but related parts. Color can produce harmony as can repetitions of related shapes. Even space can create harmony when the spaces between shapes in an artwork are uniform.