#define LED_PIN 2

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

void loop() {
  // S
  digitalWrite(LED_PIN, HIGH);
  delay(200);
  digitalWrite(LED_PIN, LOW);
  delay(200);
  
  digitalWrite(LED_PIN, HIGH);
  delay(200);
  digitalWrite(LED_PIN, LOW);
  delay(200);
  
  digitalWrite(LED_PIN, HIGH);
  delay(200);
  digitalWrite(LED_PIN, LOW);
  delay(500);

  // O
  digitalWrite(LED_PIN, HIGH);
  delay(500);
  digitalWrite(LED_PIN, LOW);
  delay(500);
  
  digitalWrite(LED_PIN, HIGH);
  delay(500);
  digitalWrite(LED_PIN, LOW);
  delay(500);
  
  digitalWrite(LED_PIN, HIGH);
  delay(500);
  digitalWrite(LED_PIN, LOW);
  delay(500);

  // S
  digitalWrite(LED_PIN, HIGH);
  delay(200);
  digitalWrite(LED_PIN, LOW);
  delay(200);
  
  digitalWrite(LED_PIN, HIGH);
  delay(200);
  digitalWrite(LED_PIN, LOW);
  delay(200);
  
  digitalWrite(LED_PIN, HIGH);
  delay(200);
  digitalWrite(LED_PIN, LOW);
  delay(1000);
}