void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(17, OUTPUT);
  pinMode(16, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);

}

void loop() {
  digitalWrite(14, HIGH);
  digitalWrite(4, HIGH);
  delay(3000);
  digitalWrite(14, LOW);
  digitalWrite(4, LOW);
  delay(100);
  digitalWrite(12, HIGH);
  digitalWrite(4, HIGH);
  delay(3000);
  digitalWrite(12, LOW);
  digitalWrite(4, LOW);
  delay(100);
  digitalWrite(13, HIGH);
  digitalWrite(17, HIGH);
  delay(3000);
  digitalWrite(13, LOW);
  digitalWrite(17, LOW);
  delay(100);
  digitalWrite(13, HIGH);
  digitalWrite(16, HIGH);
  delay(3000);
  digitalWrite(13, LOW);
  digitalWrite(16, LOW);
  delay(100);
// put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}