Turn images into probability distributions

[junpenglao]

Or have the trajectories transparent and slowly fading away.

@colcarroll

Another thought on continuing the project is that Hamiltonian paths are guaranteed to be closed, eventually. It might be neat to make a looping gif of a bunch of these paths in an image.

This would be awesome! Something like giving the right momentum and the sampler just zig zag throught the image like: