#define buzzer 4
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //Serial.println("Hello, ESP32!");
  pinMode(buzzer, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  tone(buzzer,500,1000);
  delay(1000); // this speeds up the simulation
  tone(buzzer,100,1000);
  delay(1000);
}