apologies, here for you.
Here's the URL: https://parakeet-dove-69ll.squarespace.com/
pw is : TestFr4nk
You can see where I have attempted to do it using banner image but it doesn't work too well, thinking maybe an SVG code or image link would work?
"https://static1.squarespace.com/static/60642958ec8402355e2eb3db/t/608045f370125d086b4af407/1619019251717/notchline.svg"