Thanks to everyone for all of your kind words.
The reason I wanted to post this was to encourage anyone who hasn't tried this technique, yet, to go try it! And to play with the designs. I don't have more of the fabric I used for other blocks, but what's playing in my mind is how neat it would be to make another tube, for a total of 4 blocks or 16 squares and try switching that around!
When I first heard "tube quilting", I thought hmmm...funny name. I was curious and had a few minutes to go check it out. I was so amazed. I guess you'd say I'm still on beginner level, but I found this so easy!