/usr/share/xscreensaver/config/flow.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 52 53 54 55 56 57 58 59 60 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="flow" _label="Flow">
<command arg="-root"/>
<video href="https://www.youtube.com/watch?v=RJjbRV0FC_A"/>
<hgroup>
<vgroup>
<number id="speed" type="slider" arg="-delay %"
_label="Frame rate" _low-label="Low" _high-label="High"
low="0" high="100000" default="10000"
convert="invert"/>
<number id="count" type="slider" arg="-count %"
_label="Count" _low-label="Few" _high-label="Many"
low="10" high="5000" default="3000"/>
<number id="cycles" type="slider" arg="-cycles %"
_label="Timeout" _low-label="Small" _high-label="Large"
low="0" high="800000" default="10000"/>
</vgroup>
<vgroup>
<number id="ncolors" type="slider" arg="-ncolors %"
_label="Number of colors" _low-label="Two" _high-label="Many"
low="1" high="255" default="200"/>
<number id="size" type="slider" arg="-size %"
_label="Length of trails" _low-label="Short" _high-label="Long"
low="-20" high="-2" default="-10" convert="invert"/>
</vgroup>
</hgroup>
<hgroup>
<vgroup>
<boolean id="rotate" _label="Rotating around attractor" arg-unset="-no-rotate"/>
<boolean id="ride" _label="Ride in the flow" arg-unset="-no-ride"/>
<boolean id="box" _label="Draw bounding box" arg-unset="-no-box"/>
</vgroup>
<vgroup>
<boolean id="periodic" _label="Periodic attractors" arg-unset="-no-periodic"/>
<boolean id="search" _label="Search for new attractors" arg-unset="-no-search"/>
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
</vgroup>
</hgroup>
<xscreensaver-updater />
<_description>
Strange attractors formed of flows in a 3D differential equation phase
space. Features the popular attractors described by Lorentz,
Roessler, Birkhoff and Duffing, and can discover entirely new
attractors by itself.
https://en.wikipedia.org/wiki/Attractor#Strange_attractor
Written by Tim Auckland; 1998.
</_description>
</screensaver>
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