ART VARIETY PRINCIPLES & ELEMENTS IN COMPOSITION : Use Varying Components of Design to Create Interest in Drawings
By varying the components of a visual design, the artist creates interest and avoids monotony. A way of accomplishing this is to establish an approach which involves theme and variations-repeating the same image, but in different sizes, colors, values and shapes.
Variety provides contrast to harmony and unity
Elements and Principles of Design : Variety - Variety is the complement to unity and is needed to create visual interest. Without unity, an image is chaotic and "unreadable;" without variety it is dull and uninteresting. Good design is achieved through the balance of unity and variety; the elements need to be alike enough so we perceive them as belonging together and different enough to be interesting.
How to create variety in your paintings and other artwork