Today I had an idea to see if I could kaleidoscope an image or make a mirror. This was something I was thinking of as a way to illustrate mono signals and then I could modify the images as the signals diverged. I played around with rotating a bit and then remembered that it could get ugly and convoluted so I did a bit of googling and the Processing forums showed a gem: scale(). I can set the scale to negative values in either the x or y dimension (or z if you want to get crazy) and then move the image accordingly and all is fine.
I set up minim to blend a noise image into my scene if there is an onset and then I played around with rotating boxes again. Look, it isn't black and white!