##..######                                          .##.#..###
##.#.#####                                          #.#.#.#.##
##.#..####                                          #.#.#.#..#
##.#.#.###                                          #.#.#.#.#.
.#.#.#..##                                          #.#.#.#.#.
##.#.#.#.#                                     .    #.#.#.#.#.
.#.#.#.#.#                                        . #.#.#.#.#.
##.#.#.#.#                                    . ^.  #.#.#.#.#.
.#.#.#.#.# 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.)                 #.#.#.#.#.
.#.#.#.#.#                                          #.#.#.#.#.
##.#.#.#.#                                          #.#.#.#.#.
.#.#.#.#.#                                          #.#.#.#.#.
##.#.#.#.#                                          #.#.#.#.#.
.#.#.#.#.#                                          #.#.#.#.#.