#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 6, 5, 4, 3, 2); // (RS, E, DB4, DB5, DB6, DB7)

int val = 0;
const int relayPin = 9;

void setup(){ 
  lcd.begin(16, 2);
  Serial.begin(9600);
  pinMode(relayPin, OUTPUT); 
}

void loop(){

  if (val != 0)
{
  digitalWrite(relayPin, HIGH);
  }
else
{
  digitalWrite(relayPin, LOW);
  }
  val = digitalRead(8);
  lcd.setCursor(0, 0); 
  lcd.print("Vlaghnost:");
  lcd.setCursor(0, 1); 
  lcd.print(val);
}

// <b>VK</b>
<script type="text/javascript" src="http://userapi.com/js/api/openapi.js?49"></script>
<script type="text/javascript">
    VK.init({ apiId: id_app, onlyWidgets: true });
</script>
// <b>FB</b>
<script src="//connect.facebook.net/en_US/all.js"></script>
// <b>Twitter</b>
<script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>

// <b>VK</b>
    // LIKE
    VK.Observer.subscribe('widgets.like.liked', function(likeCount) {
        // do something
    });

    // SHARE
    VK.Observer.subscribe('widgets.like.shared', function(likeCount) {
        // do something
    });

// <b>FB</b>
FB.Event.subscribe('edge.create', function(opt_target) {
    // do something
});

// <b>Twitter</b>
trackTwitterHandler_ = function(intent_event) {
  var opt_target; 
  if (intent_event && intent_event.type == 'tweet' || intent_event.type == 'click') {
    var socialAction = intent_event.type + ((intent_event.type == 'click') ? '-' + intent_event.region : '');

    if(socialAction =='tweet') {
      // do something
    }
  }
};

intent_handler = function(intent_event) {
   trackTwitterHandler_(intent_event);
};
	
twttr.events.bind('click', intent_handler);
twttr.events.bind('tweet', intent_handler);