new_contents: ''' Cover the screen in green ones and zeroes, as if in the Matrix. '''
  import time, sys
  import random
  from console import getTerminalSize
  
  ESC = '\033'
  
  def getLine(cols):
      ''' Create a matrix line. '''
      CHOICES = '000111 '
      line = ''.join(random.choice(CHOICES) for _ in range(cols))
      return line
  
  def matrix():
      ''' Run the matrix. '''
      t = 0.05
  
      MATRIX_STR = '{0}[1m{0}[32m{{0}}{0}[0m'.format(ESC)
      MOVE_TO_TOP = '{}[0;0H'.format(ESC)
      while True:
          sys.stdout.write(MOVE_TO_TOP)
          rows, cols, x, y = getTerminalSize()
          s = (MATRIX_STR.format(getLine(cols)) for _ in range(rows))
          sys.stdout.write('\n'.join(s))
          sys.stdout.write('\r')
          sys.stdout.flush()
          time.sleep(t)
  
  try:
      matrix()
  except:
      print('')
  
subject: Add old matrix file