This is not a stand alone app. Theme require Kustom Live Wallpaper Maker PRO application ( not free version of this app)

What you need:

✔ Kustom (KLWP) PRO
✔ Compatible launcher that supported by KLWP (Nova launcher is recommended)

How to install:

✔ Download Modern Material Theme and KLWP PRO application
✔ Open your KLWP app choose menu icon on top left then load preset
✔ Find and tap on the Modern Material Theme
✔ Hit "SAVE" button on the top right

Instructions:

In the Nova launcher settings you need:
✔ select 4 screen
✔ set wallpaper scrolling
✔ hide status bar and dock

In the KLWP settings you need:
✔ select 4 screens

Please contact me with any questions/issues before leaving a negative rating.