Watch and listen (preferably with headphones) until the end. Then do it again, and play around with the sliders.
Thanks to @_uyu for the beautiful original project! My additions to the original project are the slowly increasing speed, the music, and the "shutter speed" slider. I also made some changes to the code, but I didn't change its functionality. I made the music in BeepBox. The title is "The Flowing Pen".
