Install hsetroot by entering the following commands in the terminal:
sudo apt update sudo apt install hsetroot
Description:
tool for composing root-pixmaps for X11
hsetroot is a tool which allows you to compose wallpapers ("root pixmaps") for X. It has a lot of options like rendering gradients, solids, images but it also allows you to perform manipulations on those things, or chain them together.
Homepage: http://thegraveyard.org/hsetroot.html
Version: 1.0.2-5build1
Section: universe/x11