#include <LiquidCrystal.h>
int led=4;
const int rs=13,en=12,d4=5,d5=6,d6=7,d7=8;
LiquidCrystal lcd(rs,en,d4,d5,d6,d7);

void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
pinMode(4, INPUT);
Serial.begin(9600);
lcd.begin(18,2);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(led, HIGH);
lcd.setCursor(0,0);
lcd.print("LED IS ON");
delay(500);
lcd.clear();
digitalWrite(led, LOW);
lcd.setCursor(0,1);
lcd.print("LED IS OFF");
delay(500);
lcd.clear();
}