old_contents: #!/usr/bin/python
  
  import time
  import datetime
  
  from Adafruit_LED_Backpack import SevenSegment
  
  # ===========================================================================
  # Clock Example
  # ===========================================================================
  segment = SevenSegment.SevenSegment(address=0x70)
  
  # Initialize the display. Must be called once before using the display.
  segment.begin()
  
  print "Press CTRL+Z to exit"
  
  # Continually update the time on a 4 char, 7-segment display
  while(True):
    now = datetime.datetime.now()
    hour = now.hour 
    minute = now.minute
    second = now.second
  
    if hour >= 21 or hour < 9:
      segment.set_brightness(0)
    else:
      segment.set_brightness(2)
    
    if hour == 12 or hour == 0:
      hour = 12 
    else:
      hour = hour % 12
  
    A = int(hour / 10)
    
    if A == 0:
      A = ' '
  
    segment.clear()
    # Set hours
    segment.set_digit(0, A)     # Tens
    segment.set_digit(1, hour % 10)          # Ones
    # Set minutes
    segment.set_digit(2, int(minute / 10))   # Tens
    segment.set_digit(3, minute % 10)        # Ones
    # Toggle colon
    segment.set_colon(second % 2)              # Toggle colon at 1Hz
  
    # Write the display buffer to the hardware.  This must be called to
    # update the actual display LEDs.
    segment.write_display()
  
    # Wait a quarter second (less than 1 second to prevent colon blinking getting$
    time.sleep(0.25)
  
new_contents: #!/usr/bin/python
  
  import time
  import datetime
  
  from Adafruit_LED_Backpack import SevenSegment
  
  # ===========================================================================
  # Clock Example
  # ===========================================================================
  segment = SevenSegment.SevenSegment(address=0x70)
  
  # Initialize the display. Must be called once before using the display.
  segment.begin()
  
  print "Press CTRL+Z to exit"
  
  # Continually update the time on a 4 char, 7-segment display
  while(True):
    now = datetime.datetime.now()
    hour = now.hour 
    minute = now.minute
    second = now.second
  
   # if hour >= 21 or hour < 9:
     # segment.set_brightness(0)
    #else:
    segment.set_brightness(8)
    
    if hour == 12 or hour == 0:
      hour = 12 
    else:
      hour = hour % 12
  
    A = int(hour / 10)
    
    if A == 0:
      A = ' '
  
    segment.clear()
    # Set hours
    segment.set_digit(0, A)     # Tens
    segment.set_digit(1, hour % 10)          # Ones
    # Set minutes
    segment.set_digit(2, int(minute / 10))   # Tens
    segment.set_digit(3, minute % 10)        # Ones
    # Toggle colon
    segment.set_colon(second % 2)              # Toggle colon at 1Hz
  
    # Write the display buffer to the hardware.  This must be called to
    # update the actual display LEDs.
    segment.write_display()
  
    # Wait a quarter second (less than 1 second to prevent colon blinking getting$
    time.sleep(0.25)
  
subject: Update clock.py