On April 25, 2015, I took an Introduction to Zentangle class with Marietta Downen.  The tile above is what I created in the class.  I have done three of the four patterns previously, but have not done any shading -- it really makes a difference!!

This is a photograph of all of the tiles prepared at the class.  The tile I prepared is in the lower right corner.  Even though we all used the same four patterns, all of the tiles look different.

It was a fun class.  I look forward to future classes.