While knitting this sock pattern, the result reminded me of a play I had the chance to see in England: The Phantom of the Opera. “Lever de rideau” which means “curtain up” in English is a name that came to my mind for this pattern that intertwines cables with the butterfly stitch which is achieved by slipping stitches.
I have prepared a video tutorial to guide you in the realization of the “Butterfly stitch” that you can find by following this link: https://youtu.be/6vWUg9SA-xc