/usr/share/xscreensaver/config/squiral.xml is in xscreensaver-data-extra 5.36-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="squiral" _label="Squiral">
<command arg="-root"/>
<video href="https://www.youtube.com/watch?v=WPhqyM9Bb4o"/>
<hgroup>
<vgroup>
<number id="delay" type="slider" arg="-delay %"
_label="Frame rate" _low-label="Low" _high-label="High"
low="0" high="100000" default="10000"
convert="invert"/>
<number id="disorder" type="slider" arg="-disorder %"
_label="Randomness" _low-label="Low" _high-label="High"
low="0.0" high="0.5" default="0.005"/>
<number id="count" type="spinbutton" arg="-count %"
_label="Seeds" low="0" high="200" default="0"/>
</vgroup>
<vgroup>
<number id="handedness" type="slider" arg="-handedness %"
_label="Handedness" _low-label="Left" _high-label="Right"
low="0.0" high="1.0" default="0.5"/>
<number id="fill" type="slider" arg="-fill %"
_label="Density" _low-label="Sparse" _high-label="Dense"
low="0" high="100" default="75"/>
<number id="ncolors" type="slider" arg="-ncolors %"
_label="Number of colors" _low-label="Two" _high-label="Many"
low="1" high="255" default="100"/>
</vgroup>
</hgroup>
<!-- #### -cycle -->
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
<xscreensaver-updater />
<_description>
Square-spiral-producing automata. The spirals grow outward until they
hit something, then they go around it.
Written by Jeff Epler; 1999.
</_description>
</screensaver>
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