Arduino sketch for spelling out "S.O.S." in morse code

gistfile1.txt

int led_pin = 13;

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

int dit_high = 60;
int dit_low = 120;
int dash_high = 120;
int dash_low = 60;
int period = 180;

void dit() {
  digitalWrite(led_pin, HIGH);
  delay(dit_high);
  digitalWrite(led_pin, LOW);
  delay(dit_low);  
}

void dash() {
  digitalWrite(led_pin, HIGH);
  delay(dash_high);
  digitalWrite(led_pin, LOW);
  delay(dash_low);
}

void loop() {
  dit();
  dit();
  dit();
  delay(period / 2);

  dash();
  dash();
  dash();
  delay(period / 2);
  
  dit();
  dit();
  dit();
  delay(period / 2);
  
  // sleep
  delay(period);  
}