In 2010-2011 I participated in Julia Kay's Portrait Party, a Flickr group devoted to drawing portraits of each other. You can scroll through these thumbnails and, if you like, click on one to embiggen it. Once it's full screen, you can click arrows slideshow style, or click a little close box in the right-hand corner to get back here.  And then you can go back to whatever it is you should really be doing with your day.