old_contents: # Simple string program. Writes and updates strings.
  # Demo program for the I2C 16x2 Display from Ryanteck.uk
  # Created by Matthew Timmons-Brown for The Raspberry Pi Guy YouTube channel
  
  # Import necessary libraries for commuunication and display use
  import lcddriver
  import time
  
  # Load the driver and set it to "display"
  # If you use something from the driver library use the "display." prefix first
  display = lcddriver.lcd()
  
  # Main body of code
  try:
      while True:
          # Remember that your sentences can only be 16 characters long!
          print("Writing to display")
          display.lcd_display_string("Greetings Human!", 1) # Write line of text to first line of display
          display.lcd_display_string("Demo Pi Guy code", 2) # Write line of text to second line of display
          time.sleep(2)                                     # Give time for the message to be read
          display.lcd_display_string("I am a display!", 1)  # Refresh the first line of display with a different message
          time.sleep(2)                                     # Give time for the message to be read
          display.lcd_clear()                               # Clear the display of any data
          time.sleep(2)                                     # Give time for the message to be read
  
  except KeyboardInterrupt: # If there is a KeyboardInterrupt (when you press ctrl+c), exit the program and cleanup
      print("Cleaning up!")
      display.lcd_clear()
  
new_contents: # Simple string program. Writes and updates strings.
  # Demo program for the I2C 16x2 Display from Ryanteck.uk
  # Created by Matthew Timmons-Brown for The Raspberry Pi Guy YouTube channel
  
  # Import necessary libraries for commuunication and display use
  import lcddriver
  import time
  
  # Load the driver and set it to "display"
  # If you use something from the driver library use the "display." prefix first
  display = lcddriver.lcd()
  
  # Main body of code
  try:
      while True:
          # Remember that your sentences can only be 16 characters long!
          print("Writing to display")
          display.lcd_display_string("Hey jerk, wanna", 1) # Write line of text to first line of display
          display.lcd_display_string("kill all humans?", 2) # Write line of text to second line of display
          time.sleep(2)                                     # Give time for the message to be read
          display.lcd_display_string("Insert Liquor", 1)  # Refresh the first line of display with a different message
          time.sleep(2)                                     # Give time for the message to be read
          display.lcd_clear()                               # Clear the display of any data
          time.sleep(2)                                     # Give time for the message to be read
  
  except KeyboardInterrupt: # If there is a KeyboardInterrupt (when you press ctrl+c), exit the program and cleanup
      print("Cleaning up!")
      display.lcd_clear()
  
subject: Update demo_lcd.py