Geometric Pattern

In this tutorial, you will find diagrams of patterns of all the primary symmetry types. The diagrams will help you to better grasp the nature of symmetry, which is a good starting point for the creation of complex seamless patterns. We also create a simple geometric pattern, in Arabian style, using Artlandia SymmetryWorks. This Illustrator plug-in produces all symmetries and makes the job of constructing geometric patterns much easier.
http://artlandia.com/products/SymmetryWorks/tutorials/Symmetry-diagrams-geometric-patterns-in-Illustrator-Tutorial.html