#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

int stareled=0;
int butonNew;
int butonOld=1;
int buttonPin = 2;  
int ledPin = 6;   

void setup()
{
  lcd.init(); // initialize the lcd
  lcd.backlight();
  lcd.clear();
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
  
}

void loop()
{
  lcd.setCursor(0,0);

  butonNew=digitalRead(buttonPin);
 
  if(butonOld==LOW && butonNew==HIGH){
    if (stareled==0){  
      digitalWrite(ledPin, HIGH);  
    lcd.print("ON ");
    stareled=1;
   } 
   else {
  
    digitalWrite(ledPin, LOW);
    lcd.print("OFF");
    stareled=0;
   }
   }
  butonOld=butonNew;
  delay(100);
}