void onA(){
  ledcAttach(33, 5000, 12);
  ledcWriteNote(33, NOTE_C, 5);
}

void onB(){
  ledcAttach(33, 5000, 12);
  ledcWriteNote(33, NOTE_D, 5);
}

void onC(){
  ledcAttach(33, 5000, 12);
  ledcWriteNote(33, NOTE_E, 5);
}

void off(){
  ledcDetach(33);
}

void setup() {
}

void loop() {
  onA();
  delay(200);
  onB();
  delay(200);
  onC();
  delay(200);
  off();
  delay(400);
}