The bubbles are in the cube, but it is hard to tell. It is kindof transparent, but I will work on that as well. I'll update it with those improvements.

Usually, I am actually only drawing 100 pixels by 100 pixels for each face. However, this currently has the limitation of not being scalable. That's when I use the polygon's (in the slow mode), but as you know, this is very slow. I am currently working on what you just mentioned, essentially my own polygon drawing code..

That sounds cool. It will be a little tricky though, so, it might take me a little bit to make it. I think I could have it done by the weekend.

That is all in meters and assuming you are doing this on earth: so if you want to change it to your own variables, the basic equation is this: 2*PI*sqrt(length of pendulum/Gravitational acceleration)