Did it in a couple of hours, this one, but I did it some time ago, so I'm not sure if I posted it. Pretty easy to do, the only really hard thing is perfecting the waveform which I still haven't REALLY done, but it's close enough.
Bike theme:
Again, I'm a procrastinator so I did this in a few days, but I timed myself to about 3-4 minutes a frame, 6 at most. But, again not really hard, and yes, again getting the waveform perfect would have been helpful, since they both use the same one.