int ledPin=13;


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

void loop()
{
  // S
  
 digitalWrite(ledPin, HIGH);
 delay(50);
 digitalWrite(ledPin, LOW);
 delay(200); 
 
  digitalWrite(ledPin, HIGH);
 delay(50);
 digitalWrite(ledPin, LOW);
 delay(200);
 
  digitalWrite(ledPin, HIGH);
 delay(50);
 digitalWrite(ledPin, LOW);
 delay(200);
 
 delay(200);
 
 // O
 
  digitalWrite(ledPin, HIGH);
 delay(250);
 digitalWrite(ledPin, LOW);
 delay(200);

  digitalWrite(ledPin, HIGH);
 delay(250);
 digitalWrite(ledPin, LOW);
 delay(200);

  digitalWrite(ledPin, HIGH);
 delay(250);
 digitalWrite(ledPin, LOW);
 delay(200); 
 
 // S
 
  digitalWrite(ledPin, HIGH);
 delay(50);
 digitalWrite(ledPin, LOW);
 delay(200);
 
  digitalWrite(ledPin, HIGH);
 delay(50);
 digitalWrite(ledPin, LOW);
 delay(200);
 
  digitalWrite(ledPin, HIGH);
 delay(50);
 digitalWrite(ledPin, LOW);
 delay(200);
 
 delay(5000);
}