“…It is often claimed that everyday life lacks analogies for the concept of recursion (Pirolli and Anderson, 1985), so it is no surprise that most authors come up with the same objects, such as cauliflowers, including the healthy broccoli, ringed targets, tree branches, reflections on facing mirrors, tilings (Chu and Johnsonbaugh, 1987), ladders (Levy and Lapidot, 2002) and Russian dolls (Bowman and Seagraves, 1985). Typical geometric figures are fractals (Riordon, 1984b, Elenbogen and O'Kennon, 1988, Wakin, 1989, Bruce et al, 2005, Ammari-Allahyari, 2005, Stephenson, 2009b, Gordon, 2006 and certain kinds of artwork, most notably by the Dutch graphic artist M. C. Escher (Gunion et al, 2009b).…”