[Richard] takes this idea one ... s] tie-dye adventure is cleanly documented on the blog. He simply spools a reel of nylon together and dyes subsections of the spool with a different color.

If you haven’t tried tie-dying ... which colour, or colours you’d like to make. Experimentation is key here, so don’t pick your favourite t-shirt to dye on, try with an old one, or one ...