/usr/share/xscreensaver/config/moebius.xml is in xscreensaver-gl 5.15-3+deb7u1.
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 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="moebius" _label="Moebius">
<command arg="-root"/>
<number id="delay" type="slider" arg="-delay %"
_label="Frame rate" _low-label="Low" _high-label="High"
low="0" high="100000" default="20000"
convert="invert"/>
<boolean id="solid" _label="Solid floor" arg-set="-solidmoebius"/>
<boolean id="ants" _label="Draw ants" arg-unset="-no-ants"/>
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
<_description>
This animates a 3D rendition M.C. Escher's "Moebius Strip II",
an image of ants walking along the surface of a moebius strip.
http://en.wikipedia.org/wiki/Moebius_strip
http://en.wikipedia.org/wiki/Maurits_Cornelis_Escher
Written by Marcelo F. Vianna; 1997.
</_description>
</screensaver>
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