/*
  Forum: https://forum.arduino.cc/t/tone-on-2-pins-simultaneously/1193203/7
  Wokwi: https://wokwi.com/projects/382583782521458689
  
*/

#include <Tone.h>

int notes1[] = {NOTE_C4, NOTE_D5, NOTE_E5, NOTE_F5, NOTE_G5};
int noOfNotes1 = sizeof notes1 / sizeof notes1[0];

int notes2[] = {NOTE_D6, NOTE_E4, NOTE_G5, NOTE_A4, NOTE_C5};
int noOfNotes2 = sizeof notes2 / sizeof notes2[0];

Tone tone1;
Tone tone2;

int count1 = 0;
int count2 = 0;
int count3 = 0;
unsigned long lastChange = 0;

void setup()
{
  tone1.begin(13);
  tone2.begin(12);
}

void loop()
{
  if (millis() - lastChange > 33) {
    lastChange = millis();
    tone1.play(notes1[count1]);
    tone2.play(notes2[count2]);
    count1++;
    if (count1 >= noOfNotes1) {
      count1 = 0;
      count2++;
      if (count2 >= noOfNotes2) {
        count2 = 0;
        count3++;
      }
    }
  if (count3 > 2){
    tone1.stop();
    tone2.stop();
    lastChange = millis();
    while (millis()-lastChange < 333);
    count3 = 0;
    count2 = 0;
    count1 = 0;
  }

  }
}