Nyancat rendered in your terminal.
First build the C application:
make
You can run the C application standalone. It will prompt you to select a color mode.
./nyancat
To run the telnet server, use:
sudo ./nyancat.py
(The server will only try to start on port 23, so you must be root)
The original source of the Nyancat animation is prguitarman.
The code provided here is provided under the terms of the NCSA license.