void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(33,OUTPUT);
  pinMode(32,OUTPUT);
  pinMode(27,OUTPUT);
  pinMode(14,OUTPUT);
  pinMode(19,OUTPUT);
  pinMode(18,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(16,OUTPUT);
}

void loop() {
  digitalWrite(33,HIGH);
  digitalWrite(14,HIGH);
  digitalWrite(18,HIGH);
  digitalWrite(4,HIGH);
  digitalWrite(32,LOW);
  digitalWrite(27,LOW);
  digitalWrite(19,LOW);
  digitalWrite(16,LOW);
  delay(2000);

  digitalWrite(33,LOW);
  digitalWrite(14,LOW);
  digitalWrite(18,LOW);
  digitalWrite(4,LOW);
  digitalWrite(32,HIGH);
  digitalWrite(27,HIGH);
  digitalWrite(19,HIGH);
  digitalWrite(16,HIGH);
  delay(2000); 
}