Each coloured band represents the genre of a nook I read this year. Purple is fantasy, pink is romantasy, teal is scifi and red is romance. I was just learning to crochet when I started, so I made some mistakes and choices at the beginning I wouldn't now, but it doesn't need to be perfect. This covers the 36 books I read through june, and it's just over 6' long! No idea where I'm going to store/display it when I'm done!