I call this "ColorfulAccordion." Seemed fitting. It demonstrates an accordion-style drag open/close shade. Mostly made for fun and to practice with condensing layer code as much as possible. The document is thoroughly commented so please feel free to read and play around with it. If you're initially testing it in the browser, note that you can drag starting from first layer on the left. That's the only one that is draggable and the others follow suit. The initial concept was from Stephen Crowley!