I have placed the code for download here:
Must say it is quite messy, especially the bits where the timing of certain changes is controlled - they seem to be all over the place. Might not be very generative in that perspective, but it's a fair try I think :)
About the cubes disappearing: I translate them a bit more away into depth every frame, and it seems once they reach a certain depth they disappear by themselves. I've noticed this odd behaviour in other sketches as well, but I don't mind the desintegration effect that it brings :)
I do notice now that at the end my timing is a bit off, music stopped 30 seconds before lol
For the rendering I used the OpenGL renderer, like calsign suggests. The blending effects too are done with OpenGL, so that makes it faster
And I'm very glad you both like it :) It was my first 'big' processing project hehe :)