I'm taking a few photos that explain better how to do this and I'm working through the yards and how to describe this. I'll upload photos tonight - this is a good description.
Now - you're not making a rainbow so I'll work up a description for how to hang a horizontal installation as well. You're doing a sari, meaning you have, what 10 yards of 1 type of fabric, right? That's a bit different but I'll work up a description for that too. Are you interested in cutting it or do you want to hang it like a wave across the room a few times and not in a circular fashion?
Gimme a few details on what the fabric is like and I'm gonna keep working on these instructions. :)