,,,##,,#,,                                          ,,,,,,,,,,
##,,,,,,,#                                          ##########
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,,,,###,,#                                          ,#########
,##,,#,,,,                                          ,,#######,
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######,,##                                        , ##,,###,,#
#####,,,,,                                    , ,,  ,,,,,#,,,,
,###,,#### 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.)                 ,##,,###,,
##,,######                                          ,,,,,,#,,#
#,,,,#####                                          ,####,,,,,
,,##,,###,                                          ,,##,,###,
#,,,,,,#,,                                          #,,,,,,#,,
,,####,,,#                                          ,,####,,,,