Andy Warhol tribute

For a while I have wanted to put together a Warhol-esque collage of the cats.  I was organizing a box and came across an empty frame with four openings and decided it might be a cute display.  This was my inspiration:

I found some straight on head shorts of each of the kitties and used the heat map function in Picasa (oh how I love Picasa) to manipulate the colors.

This is what I came up with.  What do you think?  Its kinda funky and different and a fun way to show off the kitties.