Here is the code:
sudo apt install git make gcc libgtk-3-dev libpolkit-gobject-1-dev
git clone https://github.com/thiggy01/gdm-background.git
cd gdm-background/
make
sudo make installHere is the code:
sudo apt install git make gcc libgtk-3-dev libpolkit-gobject-1-dev
git clone https://github.com/thiggy01/gdm-background.git
cd gdm-background/
make
sudo make install