Let’s break down what each line of your Blink code means:

void setup() {
pinMode(2, OUTPUT);
}

✅ This line runs once. It tells Arduino: “Pin 2 will be used to send voltage.”

void loop() {
digitalWrite(2, HIGH); // turn LED on
delay(500); // wait 0.5 seconds
digitalWrite(2, LOW); // turn LED off
delay(500); // wait 0.5 seconds
}

✅ This part runs over and over:

• digitalWrite(2, HIGH) sends 5V to pin 2 — LED turns on

• delay(500) pauses for half a second

• digitalWrite(2, LOW) sends 0V — LED turns off

• Another pause, and the cycle repeats

✅ Your Task:

1. Make sure your LED is connected to Digital Pin 2, as shown in the wiring diagram

2. Upload the code above

3. Watch the LED blink every 0.5 seconds

4. (Optional) Try changing the delay(500) values to blink faster or slower

🎉 Great job! You’ve built your first working Arduino project!