If you are wondering, I did not colour the entire background black. If you make a zentangle, you can cut it out and put it in front of a black duotang, piece of paper, or backdrop of some kind, and it can look like you drew the zentangle right on.
When I saw how many views this had compared to what I usually get, I rolled as far away from the computer as I could, stared at the screen, and started screaming- Thank you all so much!