Grid, circles, arcs from two opposite corners and two adjacent sides

Sol LeWitt (1928-2007) Grid, circles, arcs from two opposite corners and two adjacent sides signed, titled and dated 'grid, circles, arcs from two opposite corners and two adjacent sides. Sol LeWitt 11/25/71' (on the reverse) ink on paper 7 x 7 in. (17.7 x 17.7 cm.) Drawn in 1971.