#define LED_1 18
#define LED_2 19
#define LED_3 21
#define LED_4 25
#define LED_5 26
#define LED_6 27

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

  pinMode(LED_1, OUTPUT);
  pinMode(LED_2, OUTPUT);
  pinMode(LED_3, OUTPUT);
  pinMode(LED_4, OUTPUT);
  pinMode(LED_5, OUTPUT);
  pinMode(LED_6, OUTPUT);

}

void loop() {
  digitalWrite(LED_1, HIGH);
  delay(100);
  digitalWrite(LED_2, HIGH);
  delay(100);
  digitalWrite(LED_1, LOW);
  delay(100);
  digitalWrite(LED_3, HIGH);
  delay(100);
  digitalWrite(LED_4, HIGH);
  delay(100);
  digitalWrite(LED_4, LOW);
  delay(100);
  digitalWrite(LED_3, LOW);
  delay(100);
  digitalWrite(LED_5, HIGH);
  delay(100);
  digitalWrite(LED_6, HIGH);
  delay(100);
  digitalWrite(LED_5, LOW);
  delay(100);
  digitalWrite(LED_6, LOW);
  delay(100);
  digitalWrite(LED_2, LOW);
  delay(100);
  digitalWrite(LED_6, LOW);
  digitalWrite(LED_4, HIGH);
  delay(100);
  digitalWrite(LED_1, HIGH);
  delay(100);
  digitalWrite(LED_2, HIGH);
  delay(100);
  digitalWrite(LED_4, LOW);
  delay(100);
  digitalWrite(LED_5, HIGH);
  delay(100);
}