int BUZZER_PIN = 13;
int BUZZER_CHANNEL = 0;
int b1,b2,b3;


void setup() {
  pinMode(5,INPUT_PULLUP);
  ledcAttachPin(BUZZER_PIN, BUZZER_CHANNEL);
}
void loop() {
  b1 = digitalRead(5);

  if (b1== LOW)
  {
      ledcWriteNote(BUZZER_CHANNEL, (note_t)NOTE_D, 8);
      delay(10);
  }
  else
  {
      ledcWrite(0, 0);
      delay(10);
  }
  
}