program dam1
   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 newpath
   call plot(0.2,0.5,3)
   call plot(0.48,0.5,2)
   call stroke
   call newpath
   call spline(0.48,0.5,0.6,0.48,0.7,0.4,0.85,0.2,-1)
   call spline(0.48,0.5,0.6,0.48,0.7,0.4,0.85,0.2,0)
   call spline(0.48,0.5,0.6,0.48,0.7,0.4,0.85,0.2,1)
   call stroke
   call newpath
   call spline(0.48,0.3,0.52,0.305,0.6,0.28,0.8,0.15,-1)
   call spline(0.48,0.3,0.52,0.305,0.6,0.28,0.8,0.15,0)
   call spline(0.48,0.3,0.52,0.305,0.6,0.28,0.8,0.15,1)
   call stroke
   call newpath
   call wallr(0.2,0.1,0.48,0.1,28)
   call walll(0.48,0.3,0.48,0.1,20)
   call wallr(0.48,0.3,0.52,0.3,4)
   call walll(0.52,0.1,0.52,0.3,20)
   call wallr(0.52,0.1,0.8,0.1,28)
   call stroke
   call newpath
   call linety(2)
   call plot(0.48,0.5,3)
   call plot(0.9,0.5,2)
   call stroke
   call newpath
   call linety(2)
   call plot(0.52,0.3,3)
   call plot(0.9,0.3,2)
   call stroke
   call newpath
   call linety(1)
   call msmi(0.85,0.3,0.85,0.5,0.07)
   call stroke
   call text(0.83,0.383,"H")
   call fin
   stop
   end