halo - draw circular patterns

       Jamie Zawinski <jwz@jwz.org>, 6-jul-93.

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

       Copyright  © 1993 by Jamie Zawinski.  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.

       The halo program draws cool patterns based on circles.

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.

       halo - draw circular patterns

halo accepts the following options:

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

       --root  Draw on the root window.

       --window-idnumber
               Draw on the specified window.

       --mono  If on a color display, pretend we're on a monochrome display.

       --install
               Install a private colormap for the window.

       --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.

       --countinteger
               How many circles to draw.  Default 0, meaning random.

       --modeseuss|ramp|random
               In seuss mode, alternating striped curves will be drawn.

               In ramp mode, a color ramp will be drawn.

               random means pick the mode randomly.

       --delaymicroseconds
               How much of a delay should be introduced between steps of  the  animation.   Default  100000,  or
               about 0.1 second.

       --colorsinteger
               How many colors to use.  Default 100.

       --animate
               If  specified,  then  the centerpoints of the circles will bounce around.  Otherwise, the circles
               will be drawn once, erased, and a new set of circles will be drawn.

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

X(1), xscreensaver(1)

halo  [--display  host:display.screen]  [--foreground  color]  [--background  color]  [--window] [--root]
       [--window-id number][--mono] [--install] [--visual visual] [--count int] [--delay usecs] [--mode seuss  |
       ramp | random ] [--animate] [--colors integer] [--fps]