Exercise 1 - Blink Program

 

Turns on an LED on for one second, then off for one second, repeatedly.

 */
int ledPin =  13;    // LED connected to digital pin 13
// The setup() method runs once, when the sketch starts
void setup()   {              
 // initialize the digital pin as an output:
 pinMode(ledPin, OUTPUT);   
}
// the loop() method runs over and over again,
// as long as the Arduino has power
void loop()                   
{
 digitalWrite(ledPin, HIGH);   // set the LED on
 delay(1000);                  // wait for a second
 digitalWrite(ledPin, LOW);    // set the LED off
 delay(1000);                  // wait for a second
}