The bands of colour which are clearly visible in most fractals consist of pixels that required the same number of iterations to calculate. In the Mandelbrot set, these iteration bands all go entirely around the Mandelbrot set, while never overlapping each other. This creates an unusual series of concentric circles where the inner circles are actually longer than the outer circles. The inner iteration bands grow successively longer due to the increased meandering and complexity. The innermost iteration band, if there was such a thing, would be infinitely long.