program circs1
   implicit none
   call init
   call viewport(0.2,0.2,0.8,0.8)
   call xyworld(0.0,0.0,1.0,1.0)
   call linety(1)
   call linewidth(1.0)
   call newpath
   call circ(0.5,0.5,0.4)
   call stroke
   call setgray(0.5)
   call newpath
   call circ(0.5,0.7,0.05)
   call fill
   call fin
   stop
   end