Keep in mind this is NOT mine, I just wanted to show something very similar to what I was making, i was actually making mine the same way except different art (8-bit mario) and outside design, and because I DIDN'T actually get mine to work, this obviously won't count for the competition, I just wanted to show what I would have done. I think the only reason I can't get mine to work is because of a recent Minecraft bug that makes the chances of it working low, but this was made before the bug so it worked just fine. http://www.minecraftforum.net/videos/view-3692-minecraft-automatic-piston-mod-art/ lol, the Minecraft bug that stoped me is "In rare cases, when redstone travels semi-long distances (almost 15 blocks), the current won't go through all the redstone, even with a repeater just before the end of the signal. Whether this is due to redstone errors or inter-block interaction errors, it is unknown." lol, my redstone circuit is very long and has a clock...even though it's "rare" my thing is long enough for rare to be way too often...and there was no way I was spending another hour to fix it, it was 4 AM in the morning...............
