This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
if you understand how cartoons are animated i.e. lots of drawings each drawn a little differently,
then shown in quick succession so the drawings appear to have movement, maybe if you can get
a slideshow (?) of images of a fish swimmming, then, as you move the fish position you also change
the image to the next one in the slideshow.