int led1 = 2;
int led2 = 3;

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop() {

  for(int i=0; i<6; i++) {
    digitalWrite(led1, HIGH);
    delay(300);
    digitalWrite(led1, LOW);
    delay(300);
  }

  for(int i=0; i<2; i++) {
    digitalWrite(led2, HIGH);
    delay(1000);
    digitalWrite(led2, LOW);
    delay(1000);
  }

  for(int i=0; i<3; i++) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    delay(500);

    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    delay(500);
  }
}