void setup() {
  // Set pin modes for LEDs
  for (int i = 1; i <= 5; i++) {
    pinMode(i, OUTPUT);
  }
  
  pinMode(13, OUTPUT);  // If using pin 13 for a buzzer
}

void loop() {
  // Forward LED sequence
  for (int LED = 1; LED <= 5; LED++) {
    tone(13, 500);         // Turn on buzzer
    digitalWrite(LED, HIGH);
    delay(90);
    noTone(13);            // Turn off buzzer
    digitalWrite(LED, LOW);
    delay(90);
  }

  // Reverse LED sequence
  for (int LED = 5; LED >= 1; LED--) {
    tone(13, 500);         // Turn on buzzer
    digitalWrite(LED, HIGH);
    delay(90);
    noTone(13);            // Turn off buzzer
    digitalWrite(LED, LOW);
    delay(90);
  }
}