Plot of the mandelbrot set. Shown are the lines between areas of different iteration counts to exceed the boundary value 2. The lines are black on white background with a width of 2px. One unit is 512px.
<a href="//commons.wikimedia.org/wiki/User:Geek3" title="User:Geek3">Geek3</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>