gnome-control-center/capplets/screensaver/screensavers/moire.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="moire">

    <command arg="-root"/>

    <number label="Speed of Motion." low-label="Faster" id="delay"
            type="slider" default="2" arg="-delay %" low="1"
            high-label="Slower" high="500000"/>

    <number label="Number of Colors." low-label="Colors:" id="colors"
            type="spinbutton" default="30" arg="-ncolors %" low="1"
            high="264"/>

    <number label="Maximum radius increment" low-label="Smaller"
            id="offset" type="slider" default="500" arg="-offset %"
            low="5" high-label="Larger" high="500"/>

    <boolean label="Display screensaver in monochrome." arg-unset=""
             id="monochrome" test="mono" arg-set="-mono"/>

</screensaver>