/*Emma Pareschi 25 Spetmber 2017
 * I turn on a led and I turn it off
 */

int led_pin = 3; //define the pin where the Led is connected

void setup() {

  pinMode(led_pin, OUTPUT); //define pin of the Led as an output

}

void loop() {

  digitalWrite(led_pin, HIGH); //turn the Led on   
  delay(1000);                 //wait 1000millisecond 
  digitalWrite(led_pin, LOW);  //turn the Led off 
  delay(1000);                 //wait 1000millisecond
  
}