These are the ten zentangles requested as homework for DSDN142:
First off, the reproductions of others work:
Frosty by Emily Perkans ( http://pinterest.com/pin/16466354859886951/ ) and Pinecone by Brad Ham ( http://pinterest.com/pin/16466354859963769/ ).
Baton by Carol Ohl ( http://pinterest.com/pin/16466354859033232/ )
Miander by Mimi Lempart ( http://pinterest.com/pin/16466354860461675/ ) and Auroknot - Bunzo flower by helen wiliams ( http://pinterest.com/pin/16466354860082618/ )
And now my own creations:
Fist, The Hex, it starts with a hexagon placed in the midle of the surface, than other hexagons are randomly placed in sequence so that a single hexagon isn't in contact with more than two others. When a "branch" reaches the edge of the surface, the process is repeated from the starting hexagon once more. The result is a beehive like pattern.
Second is this zentagle, inspired by the Japanese flag and barrel riffling, it starts out as a circle to which tangant lines are attached and than every other of the obtained spaces are filed in with color.
A fairly simple concept using hatching and line-weight to differentiate several pattern sections revolving around a trinity.
These last two zentagles use similar techniques, I divided the space using curves, than filed the resulting spaces with repetitive geometric patterns.