void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(16,OUTPUT);
  pinMode(17,OUTPUT);
  pinMode(5,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(5,HIGH);
  delay(1000); // this speeds up the simulation
  digitalWrite(5,LOW);
  delay(3000);
  digitalWrite(17,HIGH);
  delay(1000); // this speeds up the simulation
  digitalWrite(17,LOW);
  delay(3000);
  digitalWrite(16,HIGH);
  delay(1000); // this speeds up the simulation
  digitalWrite(16,LOW);
  delay(3000);
}