This version of the pattern name, RAINBOW SQUARE, was adapted from
Maggie Malone's 5,500 QUILT BLOCK DESIGNS, illustrations #2996 and #3022, and where the pattern is attributed by Malone to Alice Gammell.
Compare with Judy Chicago's (b. 1939) RAINBOW PICKETT (illustrated left), created with Latex paint on canvas-covered plywood, and comprised of a row of six vividly colored, square-sectioned beams in graduated sizes leaning from floor to wall at 45 degrees. The sculpture employs classic rainbow colors (as does the quilt design) and it appeared at the Brooklyn Museum exhibit in the form of a 2004 re-creation of the 1964 original.
Both the quilt pattern and Judy Chicago's sculpture would seem to be exceedingly modern and simplistic, but also in some lively way quite fascinating and deeply, almost magically attractive.