sketch_led_blinking.ino

// NOTE: 1- LED BLINKING 
int pinLed = 13;


void setup() {
  // put your setup code here, to run once:
  pinMode(pinLed, OUTPUT); // NOTE: specifying pin (13) as output
  digitalWrite(pinLed, HIGH); // NOTE: sends 5v to pin (13)
  digitalWrite(pinLed, LOW); // NOTE: sends 0v to pin (13)
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(pinLed, HIGH);
  delay(2000); // NOTE: function to stop execution in milliseconds
  digitalWrite(pinLed, LOW);
  delay(1000);
}