##.#.#.#.#                                          ....#.##..
.#.#.#.#.#                                          ...##..#.#
.#.#.#.#.#                                          ..#.#.##.#
.#.#.#.#.#                                          .##.#..#.#
.#.#.#.#.#                                          #.#.#.##.#
.#.#.#.#.#                                     .    #.#.#..#.#
.#.#.#.#.#                                        . #.#.#.##.#
.#.#.#.#.#                                    . -.  #.#.#..#.#
.#.#.#.#.# gull call.                    .      . - #.#.#.##.#
.#.#.#.#.# ---------------------------------------- #.#.#..#.#
.#.#.#.#.#                                          #.#.#.##.#
.#.#.#.#.# the  seagull is a  metaphysics trick;  a #.#.#..#.#
.#.#.#.#.# world-builder's  shortcut,  to  define a #.#.#.##.#
.#.#.#.#.# section of reality and  imply  its size: #.#.#..#.#
.#.#.#.#.# place a flock of birds at the  edge  and #.#.#.##.#
.#.#.#.#.# make  their  calls  tesselate  over  the #.#.#..#.#
.#.#.#.#.# entire volume                            #.#.#.##.#
.#.#.#.#.#                                          #.#.#..#.#
.#.#.#.#.# a  seagull can  be defined by  as little #.#.#.##.#
.#.#.#.#.# as  five  vertices;  six  triangles.  (i #.#.#..#.#
.#.#.#.#.# would  recommend  handling in  swarms of #.#.#.##.#
.#.#.#.#.# at least a dozen birds.)                 #.#.#..#.#
.#.#.#.#.#                                          #.#.#.##.#
.#.#.#.#.#                                          #.#.#..#.#
.#.#.#.#.#                                          #.#.#.##.#
.#.#.#.#.#                                          #.#.#..#.#
.#.#.#.#.#                                          #.#.#.##.#