/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.

  Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO 
  it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN takes care 
  of use the correct LED pin whatever is the board used.
  If you want to know what pin the on-board LED is connected to on your Arduino model, check
  the Technical Specs of your board  at https://www.arduino.cc/en/Main/Products
  
  This example code is in the public domain.

  modified 8 May 2014
  by Scott Fitzgerald
  
  modified 2 Sep 2016
  by Arturo Guadalupi
*/

int ledPin = 3;
int button = A1;

int buttonState = 0;
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(ledPin, OUTPUT);
  pinMode(button, INPUT);
}

// the loop function runs over and over again forever
void loop() {
  
  buttonState = digitalRead(button);

  if (buttonState == HIGH) {
    // turn LED off:
    digitalWrite(ledPin, HIGH);
    delay(200);
  } else {
    // turn LED on:
    digitalWrite(ledPin, LOW);
    delay(200);
  }                     // wait for a second
}