<?xml version="1.0"?>
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<hbox flex="1" 
  style="margin:50px; background:yellow; 
  box-shadow: 1px 2px 2px black, 0 0 7px white, 0 0 14px rgb(50, 170, 255), 0 0 21px rgb(50, 170, 255); 
  border-radius: 10px;"/>
</window>
