Something I forgot to mention earlier, pressing F11 on most browsers will let you see the falling code in full-screen, potentially functioning like a screensaver.
And in case anyone's interested, I've finally just released a seamlessly looped, video wallpaper (dreamscene) rendition of the Matrix raining code project, which you can find out more about at the following post.
Check out our YouTube demo here:
And of course, a direct link to the download through our Google Drive account.
You'll need to be able to use dreamscenes in your Windows version to use it. But there are ways to get that working if your system doesn't directly support it. We'll have more details on that up on our blog soon.