#include <Arduino.h>
#include "LiquidCrystal_I2C.h"
// put function declarations here:
const int rs=D9,e=D10,d4=D11,d5=D12,d6=D13,d7=D8;
LiquidCrystal lcd(rs,e,d4,d5,d6,d7);

void setup() {
  lcd.begin(16, 2);
  // you can now interact with the LCD, e.g.:
  lcd.print("Hello omar rayen!");
}

void loop() {
 lcd.noCursor();
 delay(500);
 lcd.noCursor();
 delay(500);
}