text: from cp_ecb import encrypt_image_file, decrypt_image_file
  
  
  # A key to use for the Caesar Cipher
  KEY = 42
  
  
  def caesar(image):
      output = []
  
      for value in image:
          output += [value]  # TODO change here (this does nothing)
  
      return output
  
  
  encrypt_image_file("tux.png", caesar, "tux-caesar.png")
  