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+/*
   Blink
 
  Turns on an LED on for one second, then off for one second, repeatedly.
 
  The circuit:
  * LED connected from digital pin 13 to ground.
 
  * Note: On most Arduino boards, there is already an LED on the board
  connected to pin 13, so you don't need any extra components for this example.
 
  Modified by Brian Jepson for a webcast
 
  based on an original...
  Created 1 June 2005
  By David Cuartielles
 
  http://arduino.cc/en/Tutorial/Blink
 
  based on an orginal by H. Barragan for the Wiring i/o board
 
  */
 
 int ledPin =  13;    // LED connected to digital pin 13
 int buttonPin = 2;   // button connected to digital pin 2
 int val = 0;         // stores the state of the button
 
 // The setup() method runs once, when the sketch starts
 void setup()   {
   // initialize the LED pin as an output:
   pinMode(ledPin, OUTPUT);
 
   // initialize the button pin as an input
   pinMode(buttonPin, INPUT);
 }
 
 // the loop() method runs over and over again,
 // as long as the Arduino has power
 void loop()
 {
   val = digitalRead(buttonPin);
   if (val == HIGH) {
     digitalWrite(ledPin, HIGH);   // set the LED on
   } else {
     digitalWrite(ledPin, LOW);    // set the LED off
   }
   delay(10);
 }