To get the Morse Flasher running, you'll need to program your Circuit Playground Express with the project's code.

Connect your board to your computer using a Micro USB cable and choose how you'd like to program it.  The project code is available for MakeCode or Circuit Python.

The code for this project was written in both MakeCode and CircuitPython languages - so you can choose which one you'd like to use:

Morse Code Flasher for MakeCode

or

Morse Code Flasher for Circuit Python