new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import click
  from PIL import Image
  from utils import get_file_list
  
  
  @click.command()
  @click.argument('path', type=click.Path(exists=True))
  def set_corners(path):
      """
      Set pixels (1, 1, 1, 1) at image corners
      """
      for f in get_file_list(path):
          img = Image.open(f)
          if img.mode == 'RGBA':
              right = img.size[0] - 1
              bottom = img.size[1] - 1
              pixels = img.load()
              pixel = (1, 1, 1, 1)
              pixels[0, 0] = pixel
              pixels[right, 0] = pixel
              pixels[right, bottom] = pixel
              pixels[0, bottom] = pixel
              img.save(f)
  
  
  if __name__ == '__main__':
      set_corners()
  
subject: Add set_corners script