For this very interesting prompt I chose the "artists meditation" itself. One can argue whether it is a doodle or a zentangle - yes, I currently learned the difference. Since it has recognizable shapes and a clear "bottom" and "top", its probably a doodle. But the relaxation, the focus on the process itself without straying thoughts, the "one stroke at a time" and the repeated patterns are would make it a zentangle as well.
