void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(15, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);
  digitalWrite(5, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(13, LOW);
  digitalWrite(5, LOW);
  Serial.println("OFF");
  digitalWrite(12, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(12, LOW);
  digitalWrite(4, LOW);
  Serial.println("OFF");
  digitalWrite(14, HIGH);
  digitalWrite(15, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(14, LOW);
  digitalWrite(15, LOW);
  Serial.println("OFF");
  digitalWrite(12, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(12, LOW);
  digitalWrite(4, LOW);
  Serial.println("OFF");
   // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}