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

(* Picture of a disk:
   0 0 to 0.4 0.4 *)

newcurve marktype ellipse fill .5 marksize 0.4 0.2 pts 0.2 0.1
newcurve marktype box fill .5 gray .5 marksize 0.4 0.2 pts 0.2 0.2
newline pts 0.0 0.1   0.0 0.3
newline pts 0.4 0.1   0.4 0.3
newcurve marktype ellipse fill 1 marksize 0.4 0.2 pts 0.2 0.3

