const int LED_PIN = 15;
const int LED_PIN1 = 5;
const int LED_PIN2 = 4;

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

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  digitalWrite(LED_PIN, HIGH);
  delay(100);
  digitalWrite(LED_PIN, LOW);
  delay(100);
  digitalWrite(LED_PIN1, HIGH);
  delay(100);
  digitalWrite(LED_PIN1, LOW);
  delay(100);
  digitalWrite(LED_PIN2, HIGH);
  delay(100);
  digitalWrite(LED_PIN2, LOW);
  delay(100);
}