I actually have two run cycles in here. Press Z and X to switch cycles.
I'm really enjoying myself. I used circles to make sure the leg sections stayed the same length, and it came out great in the 4-frame cycle, so I added transition frames and now I don't think I can improve on it! I'm planning on using this as an template so I can make more complicated sprites. Feel free to use this, but please give credit. Enjoy!