Repetition is the essence of a pattern. This like the Birds Of A Feather theme, but not for people.
See also how expert photgraphers portray Patterns, Patterns 2007, Black and White Patterns, Repetition, Symmetry, Symmetry 2, Beginner Symmetry, Beginner Symmetry2, Parital Symmetry, Parital Symmetry 2006, Symmetry 2007, Repeating Shapes, Beginner Pattern, Beginner Black and White Patterns 2007. See also Break the Rules: Central Subject, which has symmetrical subjects.
Boy Scout Troop 174, Yorktown, NY. Scouting Photography Pages at http://troop174.info