Idea 2

For school last year I experimented with ink in water, and running ink down paper and It looked really good. So I thought it would be interesting to try it out on coding. I'm not sure if you can get the same smooth, dark-light/patchy look but worth a try.
I think as you click your mouse you activate a line of ink to fall, and this will make a sound as it decends down the page. As you click more to the left it creates deeper sounds and to the right higher sounds this will also be matched by colours that I feel match each sound. Also to add another dimesion would be to had extra layers in the background and collate both my paint splodges idea with this one. Creating a inky look but in the form of a spoldge (almost as if it has been thrown at the screen).