The loop function runs as long as the Arduino board is powered and will blink the LED ON and OFF withe 1 second pause between states. You can use another pin, for example pin 12 and then change the ...

It is a pretty common first project to use an Arduino (or similar) to blink an LED. Which, of course, brings taunts of: you could have used a 555! You can, of course, also use any sort of oscillato… ...

I would like to note that since the 68000 has 68,000 transistors, it’s still possible I’m using fewer transistors to blink a LED than I would with an Arduino.