<style media="screen">
  body {
    background-color: yellow;
    color: green;
    margin-left: 40px;
    margin-right: 40px;
  }
  h3 {
    text-align:center;
    color:darkred;
  }
  hr {
    height:5px; border:solid blue;
    background-color:blue;
  }
  span{
    color:blue; 
  }
</style>
