.:~:**#@@#                                          #@@#**:~:.
.....::**#                                          #**::.....
.:~:**#@@#                                          #@@#**:~:.
.:~:**#@@#                                          #@@#**:~:.
.:~:**#@@#                                          #@@#**:~:.
..:~~~:*#@                                     .    @#*:~~~:..
.:~:**#@@#                                        . #@@#**:~:.
.:~:**#@##                                    . :.  ##@#**:~:.
.:~:**##@@ 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.)                 #@@#**:~:.
.:~:**#@@#                                          #@@#**:~:.
.:~:***##@                                          @##***:~:.
.:~:**#@@#                                          #@@#**:~:.
.:~:**#@@#                                          #@@#**:~:.
....:~***@                                          @***~:....