script documentation

.local/bin/setbg

@@ -1,4 +1,9 @@
 #!/bin/sh
-# Sets the background. If given an argument, will set file as background.
+
+# In LARBS, ~/.config/wall.png is the location of the system wallpaper.  This
+# script, if given an argument, moves it there.  This script without an
+# argument sets ~/.config/wall.png as the wallpaper, which is required on login
+# if you don't want a blakc screen.
+
 [ ! -z "$1" ] && cp "$1" ~/.config/wall.png && notify-send -i "$HOME/.config/wall.png" "Wallpaper changed."
 xwallpaper --zoom ~/.config/wall.png