void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(5 , OUTPUT);
  pinMode(15 , OUTPUT);
  pinMode(13 , INPUT_PULLUP);
  pinMode(33 , INPUT_PULLUP);
}

void loop() {
  if (digitalRead(13) == LOW)
  {
  digitalWrite(15 , HIGH);
  delay(250);
  digitalWrite(15 , LOW);
  delay(250);
  }
  if (digitalRead(33) == LOW)
  {
    digitalWrite(5 , HIGH);
    delay(250);
    digitalWrite(5 , LOW);
    delay(250);
  }
  delay(10); // this speeds up the simulation
}