newgraph
xaxis min 0 max 0.4 nodraw
yaxis min 0 max 0.4 nodraw

(* newcurve marktype box marksize .6 .6 pts 0.2 0.2 fill 0 *)
(* Picture of a disk:
   0 0 to 0.4 0.4 *)

newcurve marktype ellipse gray 0 fill 1 marksize 0.4 0.2 pts 0.2 0.1
newcurve marktype box gray 1 fill 1 marksize 0.4 0.2 pts 0.2 0.2
newline gray 0 pts 0.0 0.1   0.0 0.3
newline gray 0 pts 0.4 0.1   0.4 0.3
newcurve linethickness 2 marktype ellipse gray 0 fill .8 marksize 0.4 0.2 pts 0.2 0.3