The first time you start Mu, you will be prompted to
select your 'mode' - you can always change your mind
later. For now please select Adafruit!
The current mode is displayed in the lower right corner
of the window, next to the "gear" icon. If the mode says
"Microbit" or something else, click on that and then
choose "Adafruit" in the dialog box that appears.
Mu attempts to auto-detect your board, so please plug
in your CircuitPython device and make sure it shows up
as a CIRCUITPY drive before starting Mu
Now you're ready to code! Lets keep going....