/* Blink Turns on an LED on for one second, then off for one second, repeatedly. Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN takes care of use the correct LED pin whatever is the board used. If you want to know what pin the on-board LED is connected to on your Arduino model, check the Technical Specs of your board at https://www.arduino.cc/en/Main/Products This example code is in the public domain. modified 8 May 2014 by Scott Fitzgerald modified 2 Sep 2016 by Arturo Guadalupi */ // the setup function runs once when you press reset or power the board void setup() { pinMode(A1, OUTPUT); // here I define the pin which will give the information to the LED } void loop() { // void loop I need for continueous repating of the commands contained digitalWrite(A1, HIGH); // turn the LED on (5V) delay(1000); // wait for one second (1000 ms) digitalWrite(A1, LOW); // now turn the LED off. to do this set the voltage LOW delay(5000); // wait for five seconds (this causes slow blinking) }