Untitled

<html>
<head>
<title></title>
<style>
     .myredclass{
              background-color:red;
              color: black;
     }
     .mygreenclass{
              background-color:green;
              color: white;
     }
</style>
</head>
<body>
   <p class="myredclass" > this is a paragraph with a red background </p>
   <div class="mygreenclass" > this is a div element with green background </div>
</body>
</html>