Two pictures suggested by recent comments on
Peter J. Cameron's Sept. 17 post about T.S. Eliot—

http://www.log24.com/log/pix10B/100920-Hebrews-11-3-Sm.png

http://www.log24.com/log/pix10B/100920-Walsh-Hyperplanes-sm.jpg

For some further background, see Symmetry of Walsh Functions.