The following example shows the line object:
<line name="Line1" height="12" width="178" left="21" top="318" visible="true" wallpaper="false" isReferenceObject="false" line="26 324 193 323" backStyle="solid" lineStyle="solid" lineWidth="11" backColor="palevioletred" foreColor="#00C000">
<animations>
<animateRotation expression="system\Second" rotationMin="0" rotationMax="358" centerOfRotation="(90,40)">
<defaultExpressionRange />
</animateRotation>
</animations>
</line>