The resulting regular rhythm suggests a space that could stretch on infinitely. Three Flags, Jasper Johns, 1958, encaustic on canvas, Whitney Museum of American Art, New York, USA / Bridgeman ...

The regular way these shapes change creates a progressive rhythm. Nude Descending a Staircase, No. 2, Marcel Duchamp, 1912, oil on canvas, Granger Historical Picture Archive / Alamy Stock Photo ...