#define T_DIT 300
#define T_DA 3*T_DIT //define <name> <wert>
#define T_BREAK T_DIT
#define LED_PIN 13


void s(){
  punkt();
  punkt();
  punkt();
  delay(T_BREAK);
}

void o(){
  strich();
  strich();
  strich();
  delay(T_BREAK);
}

void strich() {
  digitalWrite(LED_PIN, HIGH);
  delay(T_DA);
  digitalWrite(LED_PIN, LOW);
  delay(T_DA);
}

void punkt() {
  digitalWrite(LED_PIN, HIGH);
  delay(T_DIT);
  digitalWrite(LED_PIN, LOW);
  delay(T_DA);
}

void setup() {
  // put your setup code here, to run once:

pinMode(LED_PIN, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  
  s();
  o();
  s();
  delay(2000);
}