Grid arcs from four corners and two opposite sides

Sol LeWitt (1928-2007) Grid arcs from four corners and two opposite sides signed, titled and dated 'Grid arcs from four corners and two opposite sides / Sol LeWitt / January 2, 1972' (lower left) ink on paper 11 1/2 x 11 1/2 in. (29.2 x 29.2 cm.) Drawn in 1972.