curveto.ps

 %!
 100 100 5 0 360 arc fill
 300 700 5 0 360 arc fill
 400 500 5 0 360 arc fill
 500 200 5 0 360 arc fill
 100 100 moveto 300 700 lineto stroke
 500 200 moveto 400 500 lineto stroke
 4 setlinewidth
 100 100 moveto 300 700 400 500 500 200 curveto stroke
 showpage