Create a fractal with circles using the same process as the Sierpinski triangle (https://en.wikipedia.org/wiki/Sierpinski_triangle) respectively the Sierpinski carpet (https://en.wikipedia.org/wiki/Sierpinski_carpet).
Starting point is the unit circle. Cut out circles with decreasing radii. In the end it should look like the profile picture.
Return the area (in multiples of pi) of the remaining part of the unit circle after n iterations!