In May 2010 I spent a delightful few days in Whitinsville, MA at the CZT training seminar. One of the things we did was wander around the Oakhurst Retreat and Conference Center looking for patterns to deconstruct and turn into tangles. I had noticed the dining room ceiling during our first meal, and decided to see what I could do with that. The tangle is based on the OAKhurst ceiLING so I call it OAKLING. It takes a fair amount of concentration! I think the main thing about this tangle is to keep those initial squares and circles well-spaced. Also, make sure they're in a reasonably even grid. Here's a tile using Oakling: Tangles: Oakling, Bevia, Florez, black Pearlz, Umble, W2, Yincut Sue Clark (CZT) also designed a tangle based on this ceiling pattern. She calls it CHEERS, and you can see it here.