Canone Inverso di Bach

Enigmatic canon 1 to 2 of the "Musical Offering" by J. S. Bach (1747), the manuscript shows a pentagram only the beginning of which is connected to the end. This space is topologically equivalent to a bundle on the circumference of the segment, known as a Möbius strip. The simultaneous execution of two simple paths and retrograde gives rise to two entries, whose symmetry leads to a reversible evolution. A musical universe is built and then "deconstructed" into silence again.

Source - Thanks Barbara!