/usr/share/xscreensaver/config/moire.xml is in xscreensaver-data-extra 5.34-2ubuntu1.
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 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="moire" _label="Moire">
<command arg="-root"/>
<video href="http://www.youtube.com/watch?v=S50zFVcUe4s"/>
<number id="delay" type="slider" arg="-delay %"
_label="Duration" _low-label="1 second" _high-label="1 minute"
low="1" high="60" default="5"/>
<number id="ncolors" type="slider" arg="-ncolors %"
_label="Number of colors" _low-label="Two" _high-label="Many"
low="1" high="255" default="64"/>
<number id="offset" type="slider" arg="-offset %"
_label="Offset" _low-label="Small" _high-label="Large"
low="1" high="200" default="50"/>
<!-- #### -no-random -->
<!-- <boolean id="shm" _label="Use shared memory" arg-unset="-no-shm"/> -->
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
<xscreensaver-updater />
<_description>
When the lines on the screen
Make more lines in between,
That's a moire'!
https://en.wikipedia.org/wiki/Moire_pattern
Written by Jamie Zawinski and Michael Bayne; 1997.
</_description>
</screensaver>
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