int leds[] = {2, 3, 4, 5, 6, 7, 8}; // LEDlar uchun pinlar
int buzzer = 9; // Buzzer uchun pin
int notes[] = {262, 294, 330, 349, 392, 440, 494}; // Notalar chastotalari

void setup() {
  for (int i = 0; i < 7; i++) {
    pinMode(leds[i], OUTPUT);
  }
  pinMode(buzzer, OUTPUT);
}

void loop() {
  for (int i = 0; i < 7; i++) {
    tone(buzzer, notes[i], 500); // Notalarni ijro etish
    digitalWrite(leds[i], HIGH); // Tegishli LEDni yoqish
    delay(500); // 0.5 sekund kutish
    digitalWrite(leds[i], LOW); // LEDni o'chirish
    noTone(buzzer); // Buzzer tovushini to'xtatish
    delay(100); // Oraliq tanaffus
  }
}