// Morse code "S" and "O"
int ledPin = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  morseS(200);
  delay(500);
  morseO(200);  
  delay(1000);
}

void morseS(int timing) {
  // Three short blinks - correct
  digitalWrite(ledPin, HIGH);
  delay(timing);
  digitalWrite(ledPin, LOW);
  delay(timing);
  digitalWrite(ledPin, HIGH);
  delay(timing);
  digitalWrite(ledPin, LOW);
  delay(timing);
  digitalWrite(ledPin, HIGH);
  delay(timing);
  digitalWrite(ledPin, LOW);
  delay(timing);
}

void morseO(int timing) {
  digitalWrite(ledPin, HIGH);
  delay(timing);  
  digitalWrite(ledPin, LOW);
  delay(timing);
}