Flex 舞台背景渐变

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark">
 <s:states>
  <s:State name="down"/>
  <s:State name="over"/>
  <s:State name="up"/>
 </s:states>
 <s:Rect height="16" id="rect1" left="1" top="0" right="2" bottom="0" minWidth="14" minHeight="14" radiusX="5">
  <s:fill>
   <s:LinearGradient rotation="90">
    <s:GradientEntry alpha=".75" color="#78b4f0" ratio="0" color.over="#efcfa1" alpha.over="1.0" color.down="#ff9300" alpha.down="1.0"/>
    <s:GradientEntry alpha=".75" color="#6699cc" ratio="1" ratio.over="1" color.over="#ff9300" alpha.over="1.0" color.down="#ffcb00" alpha.down="1.0"/>
   </s:LinearGradient>
  </s:fill>
 </s:Rect>

</s:Application>