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

int pir=2;
int buz=12;

void setup() {
  // put your setup code here, to run once:
  lcd.init();
lcd.backlight();
pinMode(pir, INPUT);
pinMode(buz,OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  
int val=digitalRead(pir);
Serial.print(val);
if(val==0){
  digitalWrite(buz,HIGH);
  delay(100);
  digitalWrite(buz, LOW);
  delay(100);
  lcd.setCursor(0,0);//row,col
lcd.print("some one come");
}
else{
 digitalWrite(buz, LOW); 
 lcd.setCursor(0,1);//row,col
lcd.print("no one there");
}

}