Here is a special treat:
These patterns are created by the British snow artist Simon Beck. He does it all with his snow boots... he makes all the exact calculations and then walks and walks for 10 hours and more and thus draws fantastic patterns on the the surface of a frozen lake for example,
it's wonderful.
Here is more about him and his wonderful art:
http://www.youtube.com/watch?v=oLbYCaGSN2o (with a comment in German)
This is his very interesting facebook site, where these snow pictures are from:
He uses quilt patterns, too! :-) The pattern above is a tumbling-block-pattern, and I love it!