1- Install Kustom KLWP
2- Install Classy klwp
3- Open Classy klwp app.
4- Choose Your Theme.
5- After the template is loaded, Tap the 'save' icon to apply the template, then set KLWP as a wallpaper.
6- In Nova Launcher, set screen count to 1
Done Enjoy a whole new look of your homescreen!