Custom CSS - Rollover Animation
Rollover animation. Someone did a hack for squarespace so it's super easy (just paste custom code in header and add 2 symbols to alt text of photos)
http://www.silvabokis.com/squarespace-tips/squarespace-css-rollover-effects-triggered-by-character-sequences-in-alt-tags
He shows 5 but there are 10 different animations that can be done this way. I tried doing it for my site but it wouldn't work.
http://designshack.net/articles/css/joshuajohnson-2/
IT's just a matter of naming the container.