This one was post-processed a bit - originally it was only half as good.
The wallpaper version is available at the preceding link.
Today's Gratitude Item: Writing a Python program to automatically copy and rename a .pdf to generate marking sheets for my students. When faced with 80 files that needed to be created and individually named, writing a program to do the hard work made sense. This time around, things went remarkably smoothly. That almost never happens. Usually I go around in tight little circles for days trying to figure out how to get something to work.