Dark side of the loom

The inspiration for this came from imgur, but I can't find the link now. Apologies, random person who had this idea first!

It was pretty fiddly to set up and I need to do it again with a tripod really, but I'm impatient. Also, you can't really make out indigo too well can you? Ahh well, never mind. I have never been completely convinced of the whole blue-indigo-violet distinction anyway.

Happy Saturday everyone!