[Chimera-users] Question about animated Ramachandran plot

Hello, I would like to create an animated Ramachandran plot using an MD trajectory. One approach I've considered is using a per-frame script to save Ramachandran plot images (i.e., using the model panel, its possible to create a plot and then save the image as a png) Is there a way to do this using commands? Or is there an easier way to animate a plot of phi and psi angles over time? Thank you very much, Trina