Two color repeating patterns are constructed using either a *determinstic* symmetric dynamical
system or a *random* symmetric dynamical system. In either case, the images shown
can be thought of as colored realizations of chaotic symmetric attractors.

There are a total of 6 different types of two color repeating pattern that can be supported on
the hexagonal lattice.
A description of all the two color repeating patterns can be found in
*Symmetries of Culture*, by Washburn and Crowe.

For determinsitic dynamics, each image is constructed using iteration of an
appropriately symmetric torus map. Typically, each such map can be represented as a trigonometric
polynomial.
We refer to `Harmony, Chromatics, and Chaos', In: * Proc. Bridges Conference, 1999*,
Southwestern College, Kansas, 1-21, and `Designer chaos', * J. Computer Aided Design*, vol 33, to appear
2001, for more details on constructing two-color patterns using chaotic dynamics.

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