Arduino_101_Button.ino

// Make variables for the led, button pin number and delay
// These can be used throughout your code
int ledPin = 13;
int buttonPin = 7;
int delayMs = 250;

void setup() {
  // Tell pin 13 to work as an OUTPUT
  pinMode( ledPin, OUTPUT );
  // Tell pin 7 to work as an INPUT
  pinMode( buttonPin, INPUT_PULLUP );
}

void loop() {

  // Capture the current state of the button.
  int buttonState = digitalRead(buttonPin);

  // If the buttonState variable is LOW
  // (i.e. the button is pressed)
  if ( buttonState == LOW ) {

    // We blink our LED
    digitalWrite( ledPin, HIGH );
    delay(delayMs);
    digitalWrite( ledPin, LOW );
    delay(delayMs);

  } else {
    // else we turn the LED off.
    digitalWrite( ledPin, LOW );
  }

}