/usr/share/xscreensaver/config/decayscreen.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 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="decayscreen" _label="DecayScreen">
<command arg="-root"/>
<video href="https://www.youtube.com/watch?v=dFlyRTObuDo"/>
<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="duration" type="slider" arg="-duration %"
_label="Duration" _low-label="10 seconds" _high-label="10 minutes"
low="10" high="600" default="120"/>
<select id="mode">
<option id="random" _label="Random melt style"/>
<option id="random" _label="Shuffle melt" arg-set="-mode shuffle"/>
<option id="random" _label="Melt up" arg-set="-mode up"/>
<option id="random" _label="Melt down" arg-set="-mode down"/>
<option id="random" _label="Melt left" arg-set="-mode left"/>
<option id="random" _label="Melt right" arg-set="-mode right"/>
<option id="random" _label="Melt up, left" arg-set="-mode upleft"/>
<option id="random" _label="Melt up, right" arg-set="-mode upright"/>
<option id="random" _label="Melt down, left" arg-set="-mode downleft"/>
<option id="random" _label="Melt down, right" arg-set="-mode downright"/>
<option id="random" _label="Melt towards center" arg-set="-mode in"/>
<option id="random" _label="Melt away from center" arg-set="-mode out"/>
<option id="random" _label="Melty melt" arg-set="-mode melt"/>
<option id="random" _label="Stretchy melt" arg-set="-mode stretch"/>
<option id="random" _label="Fuzzy melt" arg-set="-mode fuzz"/>
</select>
<xscreensaver-image />
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
<xscreensaver-updater />
<_description>
Melts an image in various ways. Warning, if the effect continues after
the screen saver is off, seek medical attention.
Written by David Wald, Vivek Khera, Jamie Zawinski, and Vince Levey; 1993.
</_description>
</screensaver>
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