| http://www.w3.org/ns/prov#value | - A system as defined in claim 4 wherein said instructions for each of said plurality of simple closed geometric figures are stored as a plurality of parameter values of a trapezoid-like figure, said parameters including the base length, height, and initial slope and curvature of each of the sides of said trapezoid-like figure, and wherein said means for altering said instructions includes means for
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