Pattern - The use of the same visual element (usually a shape) multiple times in a systematic manner. Pattern is a form of repetition, but whereas repetition can be random or disorganized, pattern is organized.

Pattern in a grid organization

Complex pattern

Pattern created through repetition and arrangement of thread spools. The pattern is created by the circular spools, while the color of the thread on the spools does not follow the pattern.
Brian Snelson. [CC BY 2.0 (, via Wikimedia Commons]