Four Color Drawing Using a Different Color in Each Half Square

Sol LeWitt (1928-2007) Four Color Drawing Using a Different Color in Each Half Square signed, titled and dated 'four color drawing using a different color in each half square/ May 24, 1971/ Sol Lewitt' (lower edge) ink on paper 9 x 9in. (22.9 x 22.9cm.) Executed in 1971