How to Install Slidewall Wallpaper Changer on Ubuntu, Linux Mint

http://ubuntuhandbook.org/index.php/2013/07/install-slidewall-ubuntu-linux-mint/

To install this app, press Ctrl+Alt+T to open terminal, then follow the below steps:
1.) Copy and paste this command and run. It adds the ppa repository to your system:

sudo add-apt-repository ppa:fioan89/slidewall

2.) Update package lists to make it available:

sudo apt-get update

3.) Finally install the software:

sudo apt-get install slidewall