## Working with arrays.
# We will be relying heavily on Bash arrays to set the color of various things in our PS1. The color will be dependent on a few things, so this is why using arrays gives us greater control and is generally easier to manage.
# As an introduction, it's recommended to read this first - http://mywiki.wooledge.org/BashGuide/Arrays
# Furthermore, since arithmetic expressions are supported, you should also get yourself familiar with this - http://mywiki.wooledge.org/BashGuide/CompoundCommands#Arithmetic_Evaluation