....##.#..                                          #.###....#
...#.###..                                          ##..#...##
..###..#.#                                          .#.##..#.#
.#..#.###.                                          ###.#.####
##.###..#.                                          ..####...#
.##..#.###                                     .    .#...#..#.
#.#.###...                                        . ##..##.##.
####..#...                                    . :.  .#.#.##.##
...#.##... 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.)                 ..###.##.#
#..#.##.##                                          .#..##.##.
#.###.##.#                                          ##.#.##.##
##..##.###                                          .####.##..
.#.#.##...                                          #...##.#.#
#####.#..#                                          #..#.#####