Not sure if this answers your question but I already ran a Matrix screensaver in a framebuffer on Linux ~16 years ago. As per this post I believe it was cmatrix [1]. There's a screenshot on that page. If you look carefully you can notice some odd symbols.

One could also use MPlayer + libcaca + framebuffer.

[1] https://inconsolation.wordpress.com/2013/09/23/cmatrix-none-...