<number id="size" type="spinbutton" arg="-size %"
_label="Size" low="-20" high="20" default="-3"/>
+ <boolean id="spin" _label="Rotate Viewpoint" arg-unset="-no-spin"/>
+
<_description>
This draws spinning galaxies, which then collide and scatter their
stars to the, uh, four winds or something. Originally an Amiga