Hexagonal Pattern Made of Tetrahedra

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Take a tetrahedron with each face colored differently. Place six such tetrahedra on a flat surface around an open hexagon. Unfold three faces of each tetrahedron into the flat surface to produce a hexagon of triangles. Place such patterns side by side to cover the flat surface. If you were to roll a colored tetrahedron on that flat pattern, then the face color of the tetrahedron touching the pattern would always match the color of the pattern.
Contributed by: Sándor Kabai (March 2011)
Based on an idea by: Gábor Gévay
Open content licensed under CC BY-NC-SA
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"Hexagonal Pattern Made of Tetrahedra"
http://demonstrations.wolfram.com/HexagonalPatternMadeOfTetrahedra/
Wolfram Demonstrations Project
Published: March 7 2011