The basis of this Demonstration is a set of very simply constructed digits using Mathematica's ContourPlot.
This method for the design of letters and digits is based on research activities shared with my friend Horst Helbig, who died last year. I dedicate this publication to him.
Reference:
H. W. Franke and H. S. Helbig, "Generative Mathematics: Mathematically Described and Calculated Visual Art," in The Visual Mind (M. Emmer, ed.), Cambridge: MIT Press, 1993.