In the end of nineties, I was a demoscene coder. “Demoscene” word won’t tell a lot to the people nowadays, so I should refer to it as “video art”. So, all that “demoscene” was about writing programs, which combined beautiful computer-generated images with the music. Also, there was a music and art parts, but I am not talking about this. Not so long ago, I have downloaded a “Processing” programming/scripting language, which is dedicated to people like me – it has a simple editor and bunch of graphic functions, which allows you to build any graphical “proof of concept” software. It works well in realtime and also it has a very simple to understand code.
So, most recent application I’ve done in Processing is a “Kaleidoscope”. It works well on any Macintosh computer with camera attached, you can get OSX version here. It also changes the image basing on the sound it gets from the microphone.