// For this circuit make sure you have an LED and a 100-300 ohm 
// resistor in series on your breadboard.

// Connect the positive end of the LED
// to pin 3
int ledPin=3;

void setup() {
  // Pin 3 (variable ledPin) is going to be for OUTPUT.
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Turn ON 
  digitalWrite(ledPin, HIGH);

  // Wait for 1.5 seconds with the light on (1500 ms).
  delay(1500);
  
  // Turn OFF
  digitalWrite(ledPin, LOW);

  // Wait for 1 second
  delay(1000);
}