,@@,,@,,@,                                          ,@,@@@@@@@
,,@,@@,@@,                                          @@,,@@@@@@
,@@,,@,,@,                                          ,@,@,@@@@@
,,@,@@,@@,                                          @@,@,,@@@@
,@@,,@,,@,                                          ,@,@,@,@@@
,,@,@@,@@,                                     ,    @@,@,@,,@@
,@@,,@,,@,                                        , ,@,@,@,@,@
,,@,@@,@@,                                    , .,  @@,@,@,@,@
,@@,,@,,@, 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.)                 @@,@,@,@,@
,@@,,@,,@,                                          ,@,@,@,@,@
,,@,@@,@@,                                          @@,@,@,@,@
,@@,,@,,@,                                          ,@,@,@,@,@
,,@,@@,@@,                                          @@,@,@,@,@
,@@,,@,,@,                                          ,@,@,@,@,@