@cor_awe the letters are only substitute names for the colors so they don't have to be labeled with html code, there is no alphabetical order... you only tie the knots in the order the pattern shows, which is a different order for every pattern. If you view this page (or any pattern page) directly from the website (not the app) there are 2 video tutorials right at the top of the generated knot structure diagram. The one labeled "How to make Patterns" by Masha Knotz is very helpful, or you could also find more tutorials on YouTube. 😊