void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(5, OUTPUT);
  pinMode(33, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(19, OUTPUT);
}

void loop() {
  tone(5,12000);
  digitalWrite(33, HIGH);
  delay(250);
  noTone(5);
  digitalWrite(33, LOW);
  delay(1000);

  tone(5,12000);
  digitalWrite(25, HIGH);
  delay(250);
  noTone(5);
  digitalWrite(25, LOW);
  delay(1000);

  tone(5,12000);
  digitalWrite(18, HIGH);
  delay(250);
  noTone(5);
  digitalWrite(18, LOW);
  delay(1000);

  tone(5,12000);
  digitalWrite(19, HIGH);
  delay(250);
  noTone(5);
  digitalWrite(19, LOW);
  delay(1000);
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}