new_contents: #!/usr/bin/python3
  # coding: utf-8
  
  '''
  Create a white noise animation like a TV screen
  '''
  
  import numpy as np
  from PIL import Image
  
  width = 128
  height = 96
  n_frames = 10
  frame_duration = 100
  center_value = 64
  
  def create_image():
      image = np.zeros(shape=(height, width, 3), dtype=int)
      for y in range(0, height):
          for x in range(0, width):
              value = int(np.random.normal() * center_value) + center_value
              image[y, x] = value
      return Image.fromarray(np.uint8(np.clip(image, 0, 255)))
  
  images = list(map(lambda _: create_image(), range(0, n_frames)))
  images[0].save('out/white_noise.gif',
                 save_all=True, append_images=images[1:], optimize=False,
                 duration=frame_duration, loop=0)
  
subject: Add an animation generator script