Some years ago I saw a beautiful quilt while visiting a quilt show with my mother. I quickly drew the pattern on a zentangle tile I had in my purse. I wanted to do something with this design later.
Eventually, I decided to do each square (or 'quilt block') on a separate tile. Of course, I wanted to do this in color. I used a compass so that all the circles would connect rather than having irregular joins.
Earlier, I had done a black-and-white piece of tree trunks and branches, and decided that this would be the same size: six tiles square, mounted on a 24" canvas. Here are the 36 tiles, randomly scattered, before I did the pencil shading.
There are a number of different designs that can be made with these squares by turning them in different directions. I tried a few and decided I liked best the regular concentric form. It took a lot of shifting and turning to arrive at the final arrangement with colors connecting where I wanted them to. Little colored brads are placed at the intersections of the tiles to mask the rounded corners.
The last thing I did was to replace the small round brads with larger square ones, placed diagonally. Now it's finished! Here are a couple of details of the final piece.
And just for fun:
On another tile I had drawn a quick idea of the quarter-rounds and some possible tangles. It's on the left below. I don't think it was particularly useful, and I was about to throw it out when I thought, "No, I could do more with that." The end result is on the right, below.