I tried to implement the code as described into Atahualpa, placing the Markup bit on a fresh page, and the CSS bit into CSS Inserts, but I couldn't figure out where to put the javascript bit. After trying about ten different places with no luck, I decided to see if any brilliant users could offer a suggestion

At least the images all appear, but the transition doesn't function, so I assume it's because I haven't implemented the js correctly. http://amft-test.butterfly-soup.com/image-mosaic/
Any advice will be appreciated enormously, thanks!!