Inspired by John D. Cook[br][br][url=https://www.johndcook.com/blog/2017/10/07/exponential-sums-make-pretty-pictures/]https://www.johndcook.com/blog/2017/10/07/exponential-sums-make-pretty-pictures/[br][br][/url]And the [url=https://www.maths.unsw.edu.au/]School of Mathematics and Statistics[/url][br][br][url=https://www.maths.unsw.edu.au/about/exponential-sums]https://www.maths.unsw.edu.au/about/exponential-sums[/url]