Looks like a bunch of simple shapes tweening in opacity and scale. It would be a lot easier to recreate it in an animation app. I made a crude example, but I'm sure someone with more experience in C3 can come up with a better solution (you could probably recreate it with particles). Just play around with timing, positions, and add more shapes to get the effect you want.
ShapeTweens
If you are asking about the walk cycle, there's a ton of examples and tutorials on youtube.