Moon Border
HTML
<html>
<body>
<img id="pic" src="https://upload.wikimedia.org/wikipedia/commons/9/9a/Gull_portrait_ca_usa.jpg">
</body>
</html>
CSS
#pic{
width: 200px;
border-radius: 50%;
border-left: 10px solid black;
border-bottom: 10px solid black;
}