Arduino Blink

1/*
2  Blink
3  Turns on an LED on for one second, then off for one   second, repeatedly.
4
5  Most Arduinos have an on-board LED you can control.   On the UNO, MEGA and ZERO 
6  it is attached to digital pin 13, on MKR1000 on   pin 6. LED_BUILTIN takes care 
7  of use the correct LED pin whatever is the board   used.
8  If you want to know what pin the on-board LED is connected to on your   Arduino model, check
9  the Technical Specs of your board  at https://www.arduino.cc/en/Main/Products
10   
11  This example code is in the public domain.
12
13  modified 8 May 2014
14   by Scott Fitzgerald
15  
16  modified 2 Sep 2016
17  by Arturo Guadalupi
18*/
19int   led = 13
20
21// the setup function runs once when you press reset or power the   board
22void setup() {
23  // initialize digital pin LED_BUILTIN as an output.
24   pinMode(led, OUTPUT);
25}
26
27// the loop function runs over and over again   forever
28void loop() {
29  digitalWrite(led, HIGH);   // turn the LED on (HIGH   is the voltage level)
30  delay(1000);                       // wait for a second
31   digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
32  delay(1000);                        // wait for a second
33}
34

1/*
2  Blink
3  Turns on an LED on for one second, then off for one  second, repeatedly.
4
5  Most Arduinos have an on-board LED you can control.  On the UNO, MEGA and ZERO 
6  it is attached to digital pin 13, on MKR1000 on  pin 6. LED_BUILTIN takes care 
7  of use the correct LED pin whatever is the board  used.
8  If you want to know what pin the on-board LED is connected to on your  Arduino model, check
9  the Technical Specs of your board  at https://www.arduino.cc/en/Main/Products
10  
11  This example code is in the public domain.
12
13  modified 8 May 2014
14  by Scott Fitzgerald
15  
16  modified 2 Sep 2016
17  by Arturo Guadalupi
18*/
19int  led = 13
20
21// the setup function runs once when you press reset or power the  board
22void setup() {
23  // initialize digital pin LED_BUILTIN as an output.
24  pinMode(led, OUTPUT);
25}
26
27// the loop function runs over and over again  forever
28void loop() {
29  digitalWrite(led, HIGH);   // turn the LED on (HIGH  is the voltage level)
30  delay(1000);                       // wait for a second
31  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
32  delay(1000);                       // wait for a second
33}
34