void setup() {
  pinMode(2, OUTPUT); // LED 1
  pinMode(3, OUTPUT); // LED 2

}

// red = LED 1
// green = LED 2

void loop() {
  digitalWrite(2, HIGH);
  delay(1000); // delay 1s

  digitalWrite(3, HIGH);
  delay(1000); // delay 1s, both LED on now

  // all LEDs off
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);

  // blinking LED 1
  for(int n = 0; n<6; n++){
    digitalWrite(2, HIGH);
    delay(1000); //1s on
    digitalWrite(2, LOW);
    delay(1000); //1s off
  }

  digitalWrite(2, LOW); //turn LED 1 off before LED 2 blinks

  // blinking LED 2
  for(int i = 0; i<5; i++){
    digitalWrite(3, HIGH);
    delay(1000); //1s on
    digitalWrite(3, LOW);
    delay(1000); //1s off
  }
  digitalWrite(3, LOW); //turn LED 2 off 
}