We explain the advantage of variety. It sets your wallpaper but it also gets new wallpapers from desktoppr.co. Make an account there and sync the wallpapers to your dropbox.
In autostart.sh we launch variety. If you do not want that, put a hashtag before it and relaunch awesome.
Super + S gives you all keyboard shortcuts.
The standard wallpaper is loaded again. We will use nitrogen to set our wallpaper.
Then we investigate where this blue starwars wallpaper is coming from. In theme.lua we can change the wallpaper.