Recently I created a repository on Github that implements CSS code that emulates the design of the famous Code Rain from the movie Matrix.
If you have a website you can easily use it. It is licensed under the GPLv3. For the real Matrix feeling, you need to download a particular font. The usage is straightforward – Everything is explained in the project.

At the moment, it’s just the style, but I want to extend it to a script that really “rains” down.