Picture scanner!
Once the project plays a noise, see inside, then right-click on the 'picture' list and click 'export.' Save the file somewhere, go to Spritier, and click on the settings icon at the lower right half of the screen. See inside of Spritier, then right-click on the 'Wallpaper' list and import the text file you downloaded. Click the home icon, and the wallpaper will be whatever you picked!