.:~;%%&###                                          ###&%%;~:.
...~;%%%%#                                          #%%%%;~...
.:~~~;;%&#                                          #&%;;~~~:.
.:~;%%&###                                          ###&%%;~:.
......~%&&                                          &&%~......
.:~;%%&###                                     .    ###&%%;~:.
.:~;;;%&##                                        . ##&%;;;~:.
.....:;%##                                    . :.  ##%;:.....
.:~;%%&### 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.)                 ###&%%;~:.
.:~;%%&###                                          ###&%%;~:.
.:~;%%####                                          ####%%;~:.
....:~;%##                                          ##%;~:....
.:~;%%&&&&                                          &&&&%%;~:.
.:~;%%&&&#                                          #&&&%%;~:.