Based on https://stackoverflow.com/questions/22607043/color-gradient-algorithm/49321304#49321304
$ sudo apt install python3-pip
$ pip3 install pil
$ python3 main.py- https://www.guru99.com/learn-python-main-function-with-examples-understand-main.html
- https://stackoverflow.com/questions/12024397/no-module-named-image/32166371#32166371
- https://stackoverflow.com/questions/24320630/global-name-sqrt-not-defined#24320645
- https://stackoverflow.com/questions/5366936/python-image-library-create-and-paste-image
- lerp https://en.m.wikipedia.org/wiki/Linear_interpolation