Background reminds me of a series of metal bands / a reinforced wall.
The wallpaper version is available at the preceding link.
Today's Gratitude Item: That there were not enough "takers" for the Israeli dance elective that I offered to take at school. Whilst I would have loved to teach the kids to dance not having to do so frees up 5 hours of time for me and means not having to leave one of my classes with a reliever (substitute). It also means getting paid relief on Friday which would not have happened if I was running the elective.