Guess what? The Tate has a Tumblr and it is AWESOME because they do things like invite people to make GIFs out of art. Which produces magical creations like this:
Here's another interpretation of the same painting by Whistler.
And another more subtle version:
I can't stop laughing at this interpretation of John Brett's Lady With a Dove.
This GIF of Joanna Mary Wells' Portrait of Sidney Wells is certifiably creepy!
Trippy!
Here are all the original paintings...
Harmony in Grey and Green: Miss Cicely Alexander by James Abbott McNeill Whistler