-color: green;
   }
   #child_2 {
     width: 80px;
     background-color: blue;
   }
   #child_3 {
     width: 130px;
     background-color: gray;
   }
  ]]></style>
 </head>
 <body>
   <div id="container">
      <div id="child_1"></div>
      <div id="child_2"></div>
      <div id="child_3"></div>
   </div>
 </body>
</html>
