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Hi Chris! Really nice result, and very clear explanation. Makes a great pendant, wall art, or trivet! I like 3-dim stuff living in a 2+dim world, or vice-versa. Enjoyed seeing you at Waterloo and around the MathArt circuit! -- Dan Bach
Hi Ben and Gianluca - I put in a couple of options that will draw an empty graph with bold axes and a visible 20 x 20 grid. Graphics[GridLines -> {Range[-10, 10], Range[-10, 10]}, Axes -> True, AxesStyle -> Thick, PlotRange -> 10] ...