Blink

/*
 * Blink
 *
 * Modified from the Arduino Blink sketch.
 *
 * Turns an LED on for one second, then off for one second, 
 * and so on...  
 *
 * When J3 has a jumper in the Pin 7 position the status LED 
 * on the ZB1 is connected to Pin 7 (PD7) through a series 
 * resistor. 
 *
 */

int ledPin = 7;                 // LED connected to PD7

void setup()                    // run once, when the sketch starts
{
  pinMode(ledPin, OUTPUT);      // sets the digital pin as output
  digitalWrite(ledPin, HIGH);
}

void loop()                     // run over and over again
{
  digitalWrite(ledPin, HIGH);   // sets the LED on
  delay(1000);                  // waits for a second
  digitalWrite(ledPin, LOW);    // sets the LED off
  delay(1000);                  // waits for a second
}