int LED = 4;
int short_paus = 1000;
int long_paus = 2000;
int normal_paus = 1000;

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

void loop() {
  o();
  delay(normal_paus);
  s();
  delay(normal_paus);
  o();
}

void o() {
   for(int i = 0; i < 3; i++) {
 	digitalWrite(LED, HIGH);
 	delay(short_paus);
 	digitalWrite(LED, LOW);
 	delay(normal_paus);
    }
}

void s() {
    for(int i = 0; i < 3; i++) {
 	digitalWrite(LED, HIGH);
 	delay(long_paus);
 	digitalWrite(LED, LOW);
 	delay(normal_paus);
    }
}