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

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

<screensaver name="flag">
    <command arg="-root"/>

<!-- This is an XLOCKMORE based hack -->

<!-- Specific options for XLOCKMORE program ... -->

    <string id="text" label="Text for flag" arg="-text %"/>
    <file id="bitmap" label="Bitmap for flag" arg="-bitmap %"/>

<!-- Generic XLOCKMORE options... -->

    <number id="speed" label="Speed" low-label="Slow" high-label="Fast" 
            type="slider" low="0" high="80000" arg="-delay %" 
            from-cli-conv="80000 - var" to-cli-conv="80000 - var"
            default="79000"/>
    <number id="cycles" label="Timeout" low-label="Small" high-label="Large" 
            type="slider" low="0" high="8000000" arg="-cycles %" 
            default="40000"/>
    
    <hgroup>
        <select id="rand_size">
            <option id="rand" label="Random size up to" enable="neg_size"/>
            <option id="specific" label="Specific size of" 
                    test="size > 0" enable="pos_size"/>
        </select>
        <number id="pos_size"
                type="spinbutton" low="0" high="18" arg="-size %"
                default="8"/>
        <number id="neg_size"
                type="spinbutton" low="0" high="18" arg="-size %"
                default="-12" from-cli-conv="0 - var" to-cli-conv="0 - var"
		same-as="pos_size"/>
    </hgroup>

    <number id="ncolours" label="Number of colours" 
            low-label="Two" high-label="Many"
            type="slider" low="2" high="16384" arg="-ncolors %"
            default="64"/>

    <select id="use_color">
	<option id="color" label="Full Color" enable="ncolours"/>
	<option id="mono" label="Monochrome" arg-set="-mono" test="mono"/>
    </select>

    

</screensaver>