Once you've gotten CircuitPython onto your Circuit Playground Bluefruit boards, it's time to add some libraries. You can follow this guide page for the basics of downloading and transferring libraries to the board.
Libraries for Sensor Plotter
From the library bundle you downloaded in that guide page, transfer the following libraries onto the CLUE board's /lib directory:
Take care with selecting the correct library, there are many that have similar names.
During development, the application was tested on a CLUE using CircuitPython 5.0.0 with libraries from the adafruit-circuitpython-bundle-5.x-mpy-20200327.zip bundle. It should work on subsequent versions, the latest version is recommended.