For example a beautiful sunrise at 7:00AM or a starry sky at 10:00PM. Just drag & drop the pictures that you have chosen on Desktopia's window, set the time, and voilà! Like they say… "set it, and forget it!"
Desktopia is bundled with a specifically designed desktop picture suite by Laurent Baumann. But you could also take pictures of your own garden at various times of the day.