void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {

 // for beep beep
    // tone(14, 780, 180);
    // delay(1000);

//changing sound
   for (int freq = 255; freq < 1000; freq = freq + 100){
     Serial.println(freq);
     tone(14, freq, 180);
     delay(1000);
   }

}