A Möbius strip is a surface that only has one side. Take a strip of paper, put a half twist on it, loop the two ends and you’ll have a physical representation of this object. Cartoonist and writer Sam Wilson plays with the twisted paper model in a delightful way.
Wilson composed and punched out a piece of music onto a Möbius strip of paper and cranked it out on a little music box. Listen as he plays the normal melody and then the inverted version where the high notes are now the low notes and vice versa. It’s a beautiful tune. I could listen to it for ever.