/*  This is a default program--
    Use a Push Button to control a Led
*/
const int buttonPin = 2;     // sets button pin to pin 2
const int ledPin =  13;      // set led pin to pin 13
int buttonState=0;

void setup()
{
  pinMode(13,OUTPUT); //sets pin 13 as output
  pinMode(2,INPUT); // sets pin 2 as input
}

void loop()
{
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }
}