int led = 4;
int bt = 2;
int pbst = 0;
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0X27, 16,2);

void setup() {
  pinMode( led, OUTPUT);
  pinMode( bt, INPUT );
  lcd.init();
  lcd.backlight();

}

void loop(){
  pbst = digitalRead(bt);
  if (pbst == 1) {
    digitalWrite(led, HIGH);
    lcd.setCursor (7,0);
    lcd.print ( " LED ON " );
    
  }

  if (pbst == 0){
    digitalWrite (led, LOW);
    lcd.setCursor (7,0);
    lcd.print ( " LED OFF " );
    
  }
}