#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);  
void setup()
{
  lcd.init();
  lcd.clear();
  
  pinMode(7, INPUT);
  pinMode(6, OUTPUT);
}

void loop()
{
  int pir=digitalRead(7);
  if(pir==HIGH){
    lcd.backlight();
    digitalWrite(6, HIGH);
    for(int i=0;i<5;i++){
      lcd.setCursor(5,0);
      lcd.print("ALERTA");
      lcd.setCursor(5,1);
      lcd.print("INTRUSO");
      delay(1000);
      lcd.clear();
      delay(1000);
    }
  
  }
  else{
    digitalWrite(6, LOW);
    lcd.clear();
  }
  
}