const int numLeds = 9;
int ledPins[numLeds] = {0,2,4, 5, 12, 13, 14, 16, 17};

void setup() {
  for (int i = 0; i < numLeds; i++) {
    pinMode(ledPins[i], OUTPUT);
    Serial.begin(115200);
    Serial.println("Hello, ESP32!");
  }
}

void displayPattern(char pattern) {
  switch (pattern) {
    case 'A':
      digitalWrite(0, HIGH);
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(12, HIGH);
      digitalWrite(13, HIGH);
      digitalWrite(14, HIGH);
      digitalWrite(16, LOW);
      digitalWrite(17, HIGH);
      break;
    case 'E':
      digitalWrite(0, HIGH);
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(12, HIGH);
      digitalWrite(13, LOW);
      digitalWrite(14, HIGH);
      digitalWrite(16, HIGH);
      digitalWrite(17, HIGH);
      break;
    case 'C':
      digitalWrite(0, HIGH);
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(12, LOW);
      digitalWrite(13, LOW);
      digitalWrite(14, HIGH);
      digitalWrite(16, HIGH);
      digitalWrite(17, HIGH);
      break;
    case 'D':
      digitalWrite(0, HIGH);
      digitalWrite(2, HIGH);
      digitalWrite(4, LOW);
      digitalWrite(5, HIGH);
      digitalWrite(12, LOW);
      digitalWrite(13, HIGH);
      digitalWrite(14, HIGH);
      digitalWrite(16, HIGH);
      digitalWrite(17, LOW);
      break;
    
  }
}

void loop() {
  char alphabet[] = {'A', 'E', 'C', 'D'}; 
  int delayTime = 2000; 
  for (int i = 0; i < sizeof(alphabet) / sizeof(alphabet[0]); i++) {
    displayPattern(alphabet[i]);
    delay(delayTime);
  }
}