le fond est une cloche de lampe verte
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/21386757@N06">jehangreco</a> from st paul en jarez, france
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/jehangreco/3378807256/">mac</a>