crystal - kaleidescope.

       Jouk Jansen.

X Version 11                                   6.08 (10-Oct-2023)                                    crystal(6x)

       Copyright © 2002 by Jouk Jansen.  Permission to use, copy, modify, distribute, and sell this software and
       its documentation for any purpose is hereby granted without fee, provided that the above copyright notice
       appear in all copies and that both that copyright notice and this permission notice appear in  supporting
       documentation.   No  representations are made about the suitability of this software for any purpose.  It
       is provided "as is" without express or implied warranty.

       Moving  polygons,  similar  to  a  kaleidescope  (more like a kaleidescope than the hack called `kaleid,'
       actually.)

DISPLAY to get the default host and display number.

       XENVIRONMENT
               to  get  the  name  of  a  resource  file  that  overrides  the  global  resources  stored in the
               RESOURCE_MANAGER property.

       XSCREENSAVER_WINDOW
               The window ID to use with --root.

       crystal - kaleidescope.

--visualvisual
               Specify which visual to use.  Legal values are the name of a  visual  class,  or  the  id  number
               (decimal or hex) of a specific visual.

       --window
               Draw on a newly-created window.  This is the default.

       --root  Draw on the root window.

       --window-idnumber
               Draw on the specified window.

       --grid|--no-grid
               Whether to draw grid.

       --cell|--no-cell
               Whether to draw the cell.

       --centre|--no-centre
               Whether to center on screen

       --nxnumber
               Horizontal Symmetries.   -10 - 10.  Default: -3.

       --nynumber
               Vertical Symmetries.  -10 - 10.  Default: -3.

       --countnumber
               Count.    -5000 - 5000.  Default: -500.

       --delaynumber
               Per-frame delay, in microseconds.  Default: 60000 (0.06 seconds.).

       --ncolorsnumber
               Number of Colors.  Default: 100.

       --fps   Display the current frame rate and CPU load.

X(1), xscreensaver(1)

crystal  [--display  host:display.screen]  [--visual  visual]  [--window]  [--root]  [--window-id number]
       [--grid] [--no-cell] [--centre] [--nx number] [--ny number] [--count number] [--delay number]  [--ncolors
       number] [--fps]