Gradual change of shapes extending like ripples (Fig.
508-511)
KOHSEI (Basic Art & Design) of assembly
configurations of gradually changing shapes from a point on a surface in
directions towards four corners.
508
510
509
511
Figure 508, 509, 510: Gradual change of shape like extending ripples.
Figure 511: Gradual change of shapes extending like ripples, "Extension
1", by M.C. Escher.