Here is Maria's contribution . . .
. . . and her comments.
I love when something unexpected happens in life. I assume that is why mi2 "sparkles" so much as a tangle for me. With very little effort, the lines and shapes create an impossible Escher-like situation. There's no way that one layer—whether metal, glass or paper—can recreate what these series of simple strokes eloquently evoke. (But what a fun sculpting or 3D printing exploration this could be!)
Life is a Zentangle! I love and embrace it as it is.
Click image for larger view.
Click this link for some tips on drawing mi2.