Install xdesktopwaves by entering the following commands in the terminal:
sudo apt update sudo apt install xdesktopwaves
Description:
Simulation of water waves on the X Window System
xdesktopwaves is a cellular automata setting the background of your X Window System under water. Windows and mouse are like ships on the sea. Each movement of these ends up in moving water waves. You can even have rain and/or storm stirring up the water.
Homepage: http://xdesktopwaves.sourceforge.net/
Version: 1.3-4build1
Section: universe/games