#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); //address can be 0x27

int i, sw, c = 0;

void setup()
{
  pinMode(5, INPUT_PULLUP);
  pinMode(6, OUTPUT);
  lcd.init();
  lcd.backlight();

}

void loop()
{
  sw = digitalRead(5);
  if (sw == 0)
  {
    lcd.clear();
    digitalWrite(6, c % 2);
    c++;
    delay(250);
    if (c % 2 == 0)
    {
      lcd.setCursor(5, 0);
      lcd.print("led on");
      lcd.setCursor(7, 1);
      lcd.print(c);
      

    }
    else if (c % 2 == 1)
    {
      lcd.setCursor(5, 0);
      lcd.print("led off");
      lcd.setCursor(7, 1);
      lcd.print(c);
    }
  }

}