const int LED_PIN1=15;
const int LED_PIN2=14;
const int LED_PIN3=13;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(LED_PIN1, OUTPUT);
  pinMode(LED_PIN2, OUTPUT);
  pinMode(LED_PIN3, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
   // this speeds up the simulation
  digitalWrite(LED_PIN1, HIGH);
  delay(500);
  digitalWrite(LED_PIN1, LOW);
  delay(500);
  digitalWrite(LED_PIN2, HIGH);
  delay(500);
  digitalWrite(LED_PIN2, LOW);
  delay(500);
  digitalWrite(LED_PIN3, HIGH);
  delay(500);
  digitalWrite(LED_PIN3, LOW);
  delay(500);
  
}