// Josef Spjut
// August 2015

void setup() {
  // put your setup code here, to run once:
  pinMode(4, INPUT_PULLUP);	// set pullup resistor for button
  pinMode(13, OUTPUT);		// set LED out
  Keyboard.begin();             // start keyboard
}

void loop() {
  // put your main code here, to run repeatedly:
  int val = digitalRead(4);	// Read button
  digitalWrite(13, val);	// Turn LED to match button
  // Press 'a' if pressed, otherwise release 'a'
  if (val == LOW) {
    Keyboard.press('a');
  } else {
    Keyboard.release('a');
  }
  delay(5);			// wait 5 ms
}