old_contents: import time
  
  import board
  import displayio
  import rainbowio
  import vectorio
  
  
  def increment_color(shape):
      if shape.color_index + 1 < len(shape.pixel_shader):
          shape.color_index += 1
      else:
          shape.color_index = 0
  
  
  display = board.DISPLAY
  main_group = displayio.Group()
  
  palette = displayio.Palette(4)
  palette[0] = 0x125690
  palette[1] = 0x34BB90
  palette[2] = 0xAA1220
  palette[3] = 0xAA04BA
  
  circle = vectorio.Circle(pixel_shader=palette, radius=25, x=25, y=25)
  main_group.append(circle)
  
  rectangle = vectorio.Rectangle(pixel_shader=palette, width=50, height=50, x=25, y=75)
  main_group.append(rectangle)
  
  points = [(5, 5), (70, 20), (35, 35), (20, 70)]
  polygon = vectorio.Polygon(pixel_shader=palette, points=points, x=145, y=55)
  main_group.append(polygon)
  
  display.show(main_group)
  
  while True:
      for x in range(25, display.width - 25):
          circle.x = x
          time.sleep(0.01)
  
      increment_color(circle)
      increment_color(rectangle)
      increment_color(polygon)
  
      for x in range(display.width - 25, 25, -1):
          circle.x = x
          time.sleep(0.01)
  
      increment_color(circle)
      increment_color(rectangle)
      increment_color(polygon)
  
new_contents: import time
  import board
  import displayio
  import vectorio
  
  
  def increment_color(shape):
      if shape.color_index + 1 < len(shape.pixel_shader):
          shape.color_index += 1
      else:
          shape.color_index = 0
  
  
  display = board.DISPLAY
  main_group = displayio.Group()
  
  palette = displayio.Palette(4)
  palette[0] = 0x125690
  palette[1] = 0x34BB90
  palette[2] = 0xAA1220
  palette[3] = 0xAA04BA
  
  circle = vectorio.Circle(pixel_shader=palette, radius=25, x=25, y=25)
  main_group.append(circle)
  
  rectangle = vectorio.Rectangle(pixel_shader=palette, width=50, height=50, x=25, y=75)
  main_group.append(rectangle)
  
  points = [(5, 5), (70, 20), (35, 35), (20, 70)]
  polygon = vectorio.Polygon(pixel_shader=palette, points=points, x=145, y=55)
  main_group.append(polygon)
  
  display.show(main_group)
  
  while True:
      for x in range(25, display.width - 25):
          circle.x = x
          time.sleep(0.01)
  
      increment_color(circle)
      increment_color(rectangle)
      increment_color(polygon)
  
      for x in range(display.width - 25, 25, -1):
          circle.x = x
          time.sleep(0.01)
  
      increment_color(circle)
      increment_color(rectangle)
      increment_color(polygon)
  
subject: remove unused import