To make life easy for those wishing to experiment with attaching electronics to their Pi, Adafruit have produced an extensive and extremely useful collection of code. This includes simple CircuitPython Libraries for a large number of modules, including displays, sensors, actuators and more. 

To fetch this code, you need to use some software called 'git'. .  

You will find the icon for a Terminal on your desktop.

Before we go any further, issue the following commands in a Terminal. This will ensure your packages are up to date. It does not matter which directory you are in.

sudo apt-get update
sudo apt-get upgrade -y 
sudo apt-get dist-upgrade -y

sudo apt-get update
sudo apt-get upgrade -y 
sudo apt-get dist-upgrade -y

Run the following command to install the adafruit_blinka CircuitPython Libraries.

sudo apt install python3-pip
pip3 install adafruit-blinka

sudo apt install python3-pip
pip3 install adafruit-blinka