Arduino/arduino_nano/arduino_nano.ino


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void setup() {
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(LED_BUILTIN, HIGH);
  delay(100);
  digitalWrite(LED_BUILTIN, LOW);
  delay(100);
}