How to set different background colours in different regions in a matplotlib plot in Python

Different colours in matplotlib in Python can be found here: https://matplotlib.org/stable/gallery/color/named_colors.html Code for this video can be found here: https://github.com/SalehGoodarzian/Data-Science-in-Python/tree/9e1ba76a0abd213c3532d74f69dad14a3e1bbf8f/Project%2012