/usr/share/xscreensaver/config/goop.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 61 62 63 64 65 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="goop" _label="Goop">
<command arg="-root"/>
<video href="https://www.youtube.com/watch?v=bLMAF4Q-mGA"/>
<hgroup>
<vgroup>
<number id="delay" type="slider" arg="-delay %"
_label="Frame rate" _low-label="Low" _high-label="High"
low="0" high="100000" default="12000"
convert="invert"/>
<number id="torque" type="slider" arg="-torque %"
_label="Speed" _low-label="Slow" _high-label="Fast"
low="0.0002" high="0.0500" default="0.0075"/>
<number id="count" type="slider" arg="-planes %"
_label="Blobs" _low-label="Few" _high-label="Many"
low="1" high="50" default="12"/>
</vgroup>
<vgroup>
<number id="elasticity" type="slider" arg="-elasticity %"
_label="Elasticity" _low-label="Low" _high-label="High"
low="0.1" high="5.0" default="0.9"/>
<number id="maxv" type="slider" arg="-max-velocity %"
_label="Speed limit" _low-label="Low" _high-label="High"
low="0.1" high="3.0" default="0.5"/>
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
</vgroup>
</hgroup>
<hgroup>
<select id="mode">
<option id="transparent" _label="Transparent blobs"/>
<option id="opaque" _label="Opaque blobs" arg-set="-mode opaque"/>
<option id="xor" _label="XOR blobs" arg-set="-mode xor"/>
</select>
<select id="color-mode">
<option id="additive" _label="Additive colors (transmitted light)"/>
<option id="subtractive" _label="Subtractive colors (reflected light)"
arg-set="-subtractive"/>
</select>
</hgroup>
<xscreensaver-updater />
<_description>
Amoeba-like blobs change shape as they wander around the screen.
They are translucent, so you can see the lower blobs through the
higher ones, and when one passes over another, their colors merge. I
got the idea for this from a mouse pad I had once, which achieved the
same kind of effect in real life by having several layers of plastic
with colored oil between them.
Written by Jamie Zawinski; 1997.
</_description>
</screensaver>
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