It is called
and it can be found here.
I was captivated by this pattern when it appeared on Frivole’s blog and just had to have it as I am also very fond of square designs. Frivole warned about directional changes, but surprisingly ( and refreshingly) I had not one bit of trouble with that!
What I did find that prompted a lot of un-tatting was that I could not seem to follow the directions - I kept losing my place on the page.
I have run out of Post-Its, which I usually use to mark my place on the page, so that is probably why I had such a problem. Otherwise it is a very straightforward piece.