//Exercise 1.2
int led = D2;

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

void loop() {
    
    for( int i = 0; i < 5; i++ ) {
    //loop for 5 times 
    
        digitalWrite( led, HIGH );
        delay( 500 );
       //Delay 0.5 second
    
        digitalWrite( led, LOW );
        delay( 500 );
}

    digitalWrite( led, LOW);
    delay( 3000);
//stop for 3 seconds
}