/*
  Blink x3
  Alternates the states (on/off) of three LEDs attached to digital outputs 13,12 and 11.
  Matt Kendrick - Jan. 2012
  mattkendrick.com
*/

void setup() {                
  // initialize two digital pins as an output.
  pinMode(11, OUTPUT); 
  pinMode(12, OUTPUT); 
  pinMode(13, OUTPUT);  
}

void loop() {
  digitalWrite(13, HIGH);   // set the LED on
  digitalWrite(12, LOW);   // set the LED off
  digitalWrite(11, LOW);   // set the LED off
  delay(1000);              // wait for a second
  digitalWrite(13, LOW);   // set the LED on
  digitalWrite(12, HIGH);   // set the LED off
  digitalWrite(11, LOW);   // set the LED off
  delay(1000);              // wait for a second
  digitalWrite(13, LOW);   // set the LED on
  digitalWrite(12, LOW);   // set the LED off
  digitalWrite(11, HIGH);   // set the LED off
  delay(1000);              // wait for a second
}