How to do it...

Let's have a look at how to do this:

1. Open the main.py file and save the print('hi there') statement in the file.
2. Open the REPL through your preferred application. With the REPL open, press Ctrl + D. The following output should appear:

Adafruit CircuitPython 3.1.2 on 2019-01-07; Adafruit CircuitPlayground Express with samd21g18
>>> 
>>> 
soft reboot

Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.
main.py output:
hi there

Press any key to enter the REPL. Use CTRL-D to reload.

1. Edit the main.py file and change the contents to print('hi there again'). The following output should be automatically displayed:

soft reboot

Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.
main.py output:
hi there again

Press any key to enter the REPL. Use CTRL-D to reload.