M.C. Escher Self-Portrait 1929 Lithograph

Image take from the following site:

M. C. Escher (17 June 1898 – 27 March 1972) was a Dutch-Frisian graphic artist. He is known for his often mathematically inspired woodcuts, lithographs, and mezzotints. These feature impossible constructions, explorations of infinity, architecture, and tessellations.

More information on M. C. Escher is available on the following site:

Tessellation A tessellation is created when a shape is repeated over and over again covering a plane without any gaps or overlaps.
Below are some simple examples of tessellations:

a tessellation of triangles
external image ttri.gif
a tessellation of squares
external image tsqu.gif
a tessellation of hexagons
external image thex.gif
Diagram from:

There is more information on the link to following site:
What is tessellation?

Download and complete the following tutorial on creating your own tessellation.
(You must download both PDFs)

Tutorial from: