old_contents: from bibliopixel import animation
  from bibliopixel.colors import COLORS
  
  """
  This is an example Animation class which has a single field -
  `color` with the default value `COLORS.green`.
  
  You can edit this as you like, add and remove fields and
  write Python code in general.
  """
  
  
  class Example26(animation.Animation):
      def __init__(
              self, *args,
              # The fields for your class go here!
              color=COLORS.green,
  
              # End of the fields for your class
              **kwds):
          super().__init__(*args, **kwds)
          self.color = color
          # Your initialization code goes here.
  
      def step(self, amt=1):
          this_pixel = self.cur_step % len(self.color_list)
  
          # Set the previous pixel to black.
          self.color_list[this_pixel - 1] = COLORS.black
  
          # Set this pixel to the color
          self.color_list[this_pixel] = self.color
  
      #
      # Everything below here is optional, and you can delete it if you aren't
      # using it.
      #
  
      # pre_run is called right before the animation starts running.
      def pre_run(self):
          super().pre_run()
          # Your code goes here.
  
      def cleanup(self, clean_layout=True):
          super().cleanup(clean_layout)
          # Your code goes here.
  
  
  class Example28(Example26):
      def step(self, amt=1):
          this_pixel = self.cur_step % len(self.color_list)
  
          # Set the previous pixel to black.
          self.color_list[this_pixel - 1] = COLORS.black
  
          # Set this pixel to the color
          self.color_list[this_pixel] = self.color
          self.color_list[this_pixel - 2] = COLORS.yellow
          self.color_list[this_pixel - 3] = COLORS.black
  
new_contents: from bibliopixel.animation import animation
  from bibliopixel.colors import COLORS
  
  """
  This is an example Animation class which has a single field -
  `color` with the default value `COLORS.green`.
  
  You can edit this as you like, add and remove fields and
  write Python code in general.
  """
  
  
  class Example26(animation.Animation):
      def __init__(
              self, *args,
              # The fields for your class go here!
              color=COLORS.green,
  
              # End of the fields for your class
              **kwds):
          super().__init__(*args, **kwds)
          self.color = color
          # Your initialization code goes here.
  
      def step(self, amt=1):
          this_pixel = self.cur_step % len(self.color_list)
  
          # Set the previous pixel to black.
          self.color_list[this_pixel - 1] = COLORS.black
  
          # Set this pixel to the color
          self.color_list[this_pixel] = self.color
  
      #
      # Everything below here is optional, and you can delete it if you aren't
      # using it.
      #
  
      # pre_run is called right before the animation starts running.
      def pre_run(self):
          super().pre_run()
          # Your code goes here.
  
      def cleanup(self, clean_layout=True):
          super().cleanup(clean_layout)
          # Your code goes here.
  
  
  class Example28(Example26):
      def step(self, amt=1):
          this_pixel = self.cur_step % len(self.color_list)
  
          # Set the previous pixel to black.
          self.color_list[this_pixel - 1] = COLORS.black
  
          # Set this pixel to the color
          self.color_list[this_pixel] = self.color
          self.color_list[this_pixel - 2] = COLORS.yellow
          self.color_list[this_pixel - 3] = COLORS.black
  
subject: Fix import error in test class