Thank you so much @tuanphan for helping everyone with their codepen questions! I have one as well, https://codepen.io/justKD/pen/MWWYQBr. I've been trying to get something like this on my site for years, and I would be so so so so very grateful if you could help me out!
http://shedthemusic.com/mmtm-11
Squarespace 7.0 Montauk