http://www.dianeclancy.com/blog/diane-caroliens-weekly-zentangle-challenge/
Some of the tangles I used were Japinica, Wabi, Ogen and Organza.
Challenge #13 is Y-W-A and some of the tangles I used were Yaff, Yang, Yinglinx, Hibred, and Ahh.
Challenge #14 is L-Q-D and some of the tangles I used were Lilypads, Linden, Quib, Disunray and Drupe.
I always practice new tangles on a piece of paper before I start the actual tile. (The 3.5 inch square paper that the tangles are commonly designed on are called tiles.)Hope you have a wonderful day and I hope you find some time to tangle.