const int buttonPins[] = {2, 3, 4, 5, 6, 7, 8}; // Pins for the push buttons
const int noteFrequencies[] = {262, 294, 330, 349, 392, 440, 494}; // Frequencies for C4 to B4
const int buzzerPin = 9; // Pin for the buzzer

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

void loop() {
  for (int i = 0; i < 7; i++) {
    if (digitalRead(buttonPins[i]) == LOW) { // Button is pressed
      tone(buzzerPin, noteFrequencies[i]); // Play the corresponding note
      delay(300); // Change this delay to adjust note duration
      noTone(buzzerPin); // Stop playing the note
      delay(50); // Debounce delay
    }
  }
}