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

LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the I2C address and LCD dimensions

const String upperRowText = "oM zrii gurave namaH , I am learning Arduino.";
const String bottomRowText = "-\\^|^/- = som";

void setup() {
  lcd.begin(16, 2);   // Initialize the LCD
  lcd.backlight();    // Turn on the backlight
  lcd.setCursor(0, 0); // Set the cursor to the beginning
}

void loop() {
  scrollUpperRow();    // Call the function to scroll text on the upper row
  flashBottomRow();    // Call the function to flash text on the bottom row
}

void scrollUpperRow() {
  static int scrollIndex = 0;
  static int textLength = upperRowText.length();
  
  lcd.clear(); // Clear the LCD

  // Display 16 characters at a time on the upper row
  lcd.setCursor(0, 0);
  lcd.print(upperRowText.substring(scrollIndex, scrollIndex + 16));

  delay(100); // Adjust the delay for smooth scrolling
  
  scrollIndex = (scrollIndex + 1) % (textLength + 16); // Update the scroll index
}

void flashBottomRow() {
  lcd.setCursor(0, 1); // Set the cursor to the beginning of the bottom row
  lcd.print(bottomRowText);
  delay(200); // Interval for flashing text
  lcd.clear(); // Clear the bottom row
  delay(100); // Interval for a blank display
}