const int ledPin = 13; // Pin where the LED is connected

// Morse code representation for "Hello World" 
// Hello : .... . .-.. .-.. ---
// World : .-- --- .-. .-.. -..
const char* morseCode[] = {
  "....", // H
  ".",    // E
  ".-..", // L
  ".-..", // L
  "---",  // O
  "",     // space
  ".--",  // W
  "---",  // O
  ".-.",  // R
  ".-..", // L
  "-.."   // D
};

const char* text = "HELLO WORLD"; // Corresponding text for each Morse code

void setup() {
  pinMode(ledPin, OUTPUT); // Set the LED pin as output
  Serial.begin(9600);      // Start serial communication
}

void loop() {
  for (int i = 0; i < sizeof(morseCode) / sizeof(morseCode[0]); i++) {
    const char* code = morseCode[i];

    // Blink the Morse code
    for (int j = 0; code[j] != '\0'; j++) {
      if (code[j] == '.') {
        digitalWrite(ledPin, HIGH); // LED on for dot
        delay(250);                 // Dot duration
        digitalWrite(ledPin, LOW);  // LED off
        delay(250);                 // Space between parts of the same letter
      } else if (code[j] == '-') {
        digitalWrite(ledPin, HIGH); // LED on for dash
        delay(750);                 // Dash duration
        digitalWrite(ledPin, LOW);  // LED off
        delay(250);                 // Space between parts of the same letter
      }
    }

    delay(1000); // Space between letters

    // Print the corresponding character
    if (text[i] != ' ') {
      Serial.print(text[i]);
    } else {
      Serial.print(" ");
    }
  }
  Serial.println();
  delay(3000);
}