title: CSS3 moon shape
body: <p>I am trying to create a button like this:</p>
  
  <p><a href="https://i.stack.imgur.com/U2H1o.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/U2H1o.jpg" alt="enter image description here"></a></p>
  
  <p>I dont know how to create a light moon shape over the top of the button.</p>
  
  <p>This is still far off: <a href="https://jsfiddle.net/wgnp9ygh/2/" rel="nofollow noreferrer">Fiddle Demo</a>.</p>
  
  <pre><code>.moon {
     width: 50px;
     height: 50px;
     border-radius: 50%;
     box-shadow: 15px 15px 0 0 green;
  }
  </code></pre>