I belong to Mosaic which is a Zentangle app used for CZT's to share, appreciate and enjoy Zentangle art.  We can upload our tiles and share them with other CZT's around the world to appreciate and get inspiration.  One aspect on the app is called Tangles, Tips, & Techniques and can be used as a wonderful learning tool and inspiration.  A few nights ago I worked these tiles as a practice of the pattern Crescent Moon.  Rick Roberts shared this video on Kitchen Table Tangle called Crescent Moon Revisited.  Below find the other two tiles I did using only Crescent Moon tangle.

This last tile is our newest 3Z tiles, in tan, white or black.