// 🛠 Second Arduino Program: Blink an LED and print status in Serial Monitor
// 👉 Concepts introduced: Serial.begin(), Serial.print(), debugging with Serial Monitor

int ledPin = 13;  // LED connected to pin 13

void setup() {
  pinMode(ledPin, OUTPUT);  // Set pin as output
  Serial.begin(9600);  // 1️⃣ Initialize Serial Monitor at 9600 baud rate
}

void loop() {
  digitalWrite(ledPin, HIGH);  // Turn ON the LED
  Serial.println("LED is ON"); // 2️⃣ Print message to Serial Monitor
  delay(1000);

  digitalWrite(ledPin, LOW);   // Turn OFF the LED
  Serial.println("LED is OFF"); // 3️⃣ Print message to Serial Monitor
  delay(1000);
}