As a perfect example, these LED “blinking eyes” were created by ... Thanks to the pseudorandom number generator in the Arduino code, the “eyes” even have a bit of variability to them ...

It’s the ‘Hello World’ of computer design, and it’s at least as complex as blinking a LED with an Arduino ... A little code burned onto an EEPROM, and then I’ll actually have something ...

End Update Here is ‘blink’ modified to work TXLED and RXLED as well as LED-BUILTIN int RXLED = 17; // The RX LED has a defined Arduino pin int TXLED = 30; // The TX LED has a defined Arduino pin // ...