|Picture from an original on Facebook|
I was fascinated by this and thought what a great tangle it would make.
I have simplified things but obviously, shading and more lines could make it look even more intricate but if you like the 'pop' of Zentangle, you'll love this one!
Here it is with another squares and lines one, Dex:
And these are my stepouts together with a little ZIA. You can add more 'circles' if you see them...for example, look at step 2 and you might just see a big circle that could go around all four squares....give it a go and let me know!