The Fractal illustrated above.
References
Lauwerier, H. Fractals: Endlessly Repeated Geometric Figures. Princeton, NJ: Princeton University Press, pp. 71-73, 1991. Weisstein, E. W. ``Fractals.'' Mathematica notebook Fractal.m.
Weisstein, E. W. ``Fractals.'' Mathematica notebook Fractal.m.