Now, everything’s set up, so click the right-facing arrow near the top-left corner of the Arduino IDE window to upload the program to the board.

That’s the magic Arduino setup() and loop(). The emperor has no clothes, and the Wizard of Oz is just a pathetic little man behind a curtain.

If you are interested in learning more about using the Arduino Nano 33 BLE microcontroller, you may be interested in a new article published by Djynet.