Can't find the URL again for a funny (and probably universal) custom prompt: you had to do some

    curl <url> | sh

then you could see on your terminal thousands of various tests related to your installation, then several megabytes being downloaded with progress bars, etc.

At the very end of the whole process, the whole stuff would vanish into writing PS1="$ " at the end of your ~/.bashrc

Of course, the very same prompt was used whatever your install could be. I think it was some joke making fun of all these crazy and heavy custom prompts all around.