Draw on a newly-created window. This is the default. Draw on the root window. If on a color display, pretend we're on a monochrome display. This controls the speed at which the screen will be erased.
Lower numbers erase faster.
This sets the erase mode. Mode -1 chooses a random mode each time. This sets the number of seconds that the helix will be on the screen. Install a private colormap for the window. 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.