#
# This is the apparent contour of a torus
#
morse {
               ^ l,0                ;
     /                      \       ;
   /   ^       ^ r,0   ^      \     ;
  /  /   \   /   \   /  |      \    ;
 |  (d0++  X       X    |u2--   )   ;
  \  \   /   \   /   \  |      /    ;
   \   U       U l,0   U      /     ;
      \                   /         ;
               U                    ;
}