int ledPin = 13;                 // LED connected to digital pin 13

void setup()
{
  pinMode(ledPin, OUTPUT);      // sets the digital pin as output
}

void loop()
{
  dit(); dah();
  delay(250);
  dit(); dah();
  delay(250);
  dit(); dit(); dit();
  delay(250);
  dit(); dit(); dit();
  delay(250);
  dit(); dit(); dit();
  delay(250);
  dit(); dit(); dit();
  delay(250);
  dit(); dit(); dit();
  delay(3000);
}

void dit()
{
  digitalWrite(ledPin, HIGH);
  delay(250);
  digitalWrite(ledPin, LOW);
  delay(250);
}

void dah()
{
  digitalWrite(ledPin, HIGH);
  delay(1000);
  digitalWrite(ledPin, LOW);
  delay(250);
}