Linux from Scratch: wallpaper-changing buttons.

Given all the photos I've taken on my bike trips, I thought it was time to give my Linux From Scratch (LFS) virtual machine the ability to easily change between wallpapers with the click of a button. I've already given my NixOS host system this ability. So I added three app launchers to my dock that change the wallpaper, they're the three on the right end of the dock (excluding the trash bin). The one with the star on a blue background changes the wallpaper to a randomly-selected wallpaper. The random number used for this is generated using R, because why not? The icon immediately to its right changes the wallpaper to the next one in my ~/wallpapers folder. The next icon to its right changes the wallpaper to the previous wallpaper in ~/wallpapers. In case you're wondering, yes, the currently displayed wallpaper was one I took on a bike trip. Namely, I took it yesterday.