gingerbread

    Orbit in two dimensions defined by:

      x(n+1) = 1 - y(n) + |x(n)|
      y(n+1) = x(n)

    Two parameters: initial values of x(0) and y(0).


This simple fractal is a charming example stolen from
"Science of Fractal Images", p. 149.

         xnew = 1 - y + |x|
         ynew = x

The initial x and y values are set by parameters, defaults x=-.1, y = 0.