Edit in JSFiddle

<head>
      <title>Untitled</title>
      <style>
         body {background: linear-gradient(white, aqua);
               border: 20px solid black;
               padding-top: 20px;
               padding-left: 20px;
               border-top-left-radius: 100px;
               }
         img {border-radius: 50px;}
      </style>
</head>

<body>
			<h1>Planet Earth</h1>
			<hr>
			<p>This is our home!</p>
			<img src="http://ichef.bbci.co.uk/images/ic/480x270/p01l49tk.jpg" alt="">
</body>