800x800
center detail
Mathematica code:
Graphics[ GraphicsComplex[ Table[ {-.9908^n*Sin[n*3.72802], .9908^n*Cos[n*3.72802]}, {n, 0, 640}], Polygon[Table[i, {i, 1, 640, 1}]]], PlotRange -> 1, ImageSize -> 800]