+ <number id="count" type="slider" arg="-count %"
+ _label="Number of circles" _low-label="Few" _high-label="Many"
+ low="0" high="20" default="0"/>
+
+ <number id="ncolors" type="slider" arg="-colors %"
+ _label="Number of colors" _low-label="Two" _high-label="Many"
+ low="1" high="255" default="100"/>