Beginners Guide to Arduino

1// the setup function runs once when you press reset or power the board
2void setup() {
3  // initialize digital pin LED_BUILTIN as an output.
4  pinMode(LED_BUILTIN, OUTPUT);
5}
6
7// the loop function runs over and over again forever
8void loop() {
9  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
10  delay(1000);                       // wait for a second
11  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
12  delay(1000);                       // wait for a second
13}