Code for creating rolling out effect on 16X2 lcd used with atmega328

lcd.c

#include <avr/io.h>
#include <util/delay.h>
#include "lcd.h"
 
#define STRING_LENGTH 27
#define LCD_MAX 15 
 
void main()
{
    char array[STRING_LENGTH] = { "Namaste" };
    int i,j;
    int start;
    int end; 
 
    lcd_init(LCD_DISP_ON_CURSOR);
    lcd_clrscr();
    while(1)
    {
        for ( j = 0; j < STRING_LENGTH; j++ )
        {
            if ( j >= LCD_MAX )
                lcd_gotoxy( 0, 0 );
            else
                lcd_gotoxy( LCD_MAX - j, 0 ); 
 
            start = (j <= LCD_MAX) ? 0 : (j - LCD_MAX); 
 
            end = (j <= LCD_MAX) ? j : (start + LCD_MAX); 
 
            if ( end >= STRING_LENGTH )
                end = STRING_LENGTH - 1; 
 
            for ( i = start; i <= end; i++ )
                lcd_putc( array[i] ); 
 
            _delay_ms(100);
        } 
 
        lcd_clrscr();
    }
}