---
name: "hopalong"
section: "1x"
platform: "linux"
package: "xscreensaver"
version: "1.27-2"
release: "Debian 1.3 (Bo)"
platforms: ["linux"]
url: "https://new.carta.tech/hopalong/1x"
---

# hopalong(1x)

draw real plane fractals

## NAME

hopalong - draw real plane fractals

## SYNOPSIS

**hopalong** \[-display *host:display.screen*\] \[-foreground *color*\] \[-background *color*\] \[-window\] \[-root\] \[-mono\] \[-install\] \[-visual *visual*\] \[-count *integer*\] \[-ncolors *integer*\] \[-timeout *seconds*\] \[-delay *microseconds*\]

## DESCRIPTION

The *hopalong* program generates real plane fractals as described in the September 1986 issue of Scientific American.

## OPTIONS

*hopalong* accepts the following options:

- **-window**

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

- **-root**

  Draw on the root window.

- **-mono**

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

- **-install**

  Install a private colormap for the window.

- **-visual *visual***

  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.

- **-count *integer***

  How many pixels should be drawn before a color change.  Default 1000.

- **-ncolors *integer***

  How many colors should be used (if possible).  Default 100. The colors used cycle through the hue, making N stops around  the color wheel.

- **-timeout *seconds***

  How many seconds we should generate for before clearing the screen and starting over.  Default 20.

- **-delay *microseconds***

  How long we should wait between drawing each pixel.  Default 0.

## ENVIRONMENT

- **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.

## SEE ALSO

**X**(1), [**xscreensaver**(1)](/xscreensaver/1.md), [**xlock**(1)](/xlock/1.md)

## COPYRIGHT

Copyright © 1988-91 by Patrick J. Naughton

Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation.

## AUTHOR

Patrick J. Naughton \<naughton@eng.sun.com\>, 23-mar-88.

Ability to run standalone or with *xscreensaver* added by  Jamie Zawinski \<jwz@netscape.com\>, 13-aug-92.