  
  The circuit: 
  * Momentary switch attached from pin 2 to ground 
+ * Built-in LED on pin 13
  
  Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal 
  20K-ohm resistor is pulled to 5V. This configuration causes the input to 

  int sensorVal = digitalRead(2);
  //print out the value of the pushbutton
  Serial.println(sensorVal);
  //brief delay
  delay(10);

}



  //start serial connection
  Serial.begin(9600);
  //configure pin2 as an input and enable the internal pull-up resistor
  pinMode(2, INPUT_PULLUP);
  pinMode(13, OUTPUT); 

}

