Awesome, I'm glad you liked them!

I probably should have said in my original comment that the 3-D rotation itself was only 3 of the 15 lines:

  s = 0.1                                 # sine
  c = (1 - s**2)**0.5                     # cosine
  ...
  cube = [(c*x + s*z, y, -s*x + c*z) for x, y, z in cube] # Rotate by theta.

The rest was ASCII art, animation, perspective projection, and geometry generation.