int ledPin = D2;


void setup() {
  // Tell the Argon that we'll use D2 as an output pin.
  pinMode(ledPin, OUTPUT);
}


void loop() {
    for (int i = 0 ; i < 5 ; i++) {
        // Turn on
        digitalWrite(ledPin, HIGH);   // Turn ON the LED pins
        delay(500);               // Wait for 0.5 second 
        // Turn off
        digitalWrite(ledPin, LOW);   // Turn OFF the LED pins
        delay(500);               // Wait for 0.5 second 
    }
    
    // Turn off
        digitalWrite(ledPin, LOW);   // Turn OFF the LED pins
        delay(3000);               // Wait for 3 seconds
        
}