Adafruit LCD scroll only line 2

scroll.py

#!/usr/bin/python

import time

import Adafruit_CharLCD as LCD

lcd_columns = 16

lcd = LCD.Adafruit_CharLCDPlate()
lcd.set_backlight(0)
lcd.set_color(0.0, 0.0, 0.0)

title = '[stephack]'
msg = 'Adafruit make an adapter that uses an MCP23017 chip to allow an LCD character display (compatible with the Hitachi HD44780) to be driven over the I2C bus from the Raspberry Pi. The adapter has five buttons that can be read from the RPi by polling, but there is no provision for button presses to cause interrupts. This is easily fixed, as I explain here.'

len_msg = len(msg) - (lcd_columns - 1)
for i in range(len_msg):
  lcd.clear()
  lcd.message(title + "\n")
  lcd.message(msg[i:i+lcd_columns] + "\n")
  time.sleep(0.4)


lcd.clear()