Blink LED

1//Blinking LED
2
3const int LED = 13; // LED connected to
4                   //  digital pin 13
5
6void setup()
7{
8  pinMode(LED, OUTPUT);   // sets the  digital
9                         // pin as output  
10}
11
12void loop()
13{
14  digitalWrite(LED, HIGH);    //turns on the LED on
15  delay(1000);               //  waits for a second
16  digitalWrite(LED, LOW);   // turns the LED off
17  delay(1000);             // waits for a second
18}
19