Here is the package definition for screen message. A simple program to fill
your screen with text input either as an argument to the program or input
during execution.

Built and tested on GuixSD Linux merlin 4.15.8-gnu #1 SMP 1 x86_64 GNU/Linux.

It passes guix lint without errors.

It builds 5 times deterministicly.

Guix size says "total: 568.0 MiB"