int buzzerPin = 9; 
int ledPins[] = {2, 3, 4, 5, 6, 7, 8}; // Svetdiodlar uchun pinlar
int noteFrequencies[] = {262, 294, 330, 349, 392, 440, 494}; // Do, Re, Mi, Fa, Sol, La, Si notalarining chastotasi

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

void loop() {
  //4-topwiriq
  for (int i = 0; i < 7; i++) {
    playNote(noteFrequencies[i], ledPins[i]);
    delay(500); 
  }

}

void playNote(int noteFrequency, int ledPin) {
  tone(buzzerPin, noteFrequency, 500); 
  digitalWrite(ledPin, HIGH); 
  delay(500);
  digitalWrite(ledPin, LOW); 
  noTone(buzzerPin); 
}