old_contents: from display import Renderer
  from neopixel import Adafruit_NeoPixel
  import _rpi_ws281x as ws
  
  # LED strip configuration:
  # LED_COUNT      = 40      # Number of LED pixels.
  LED_PIN        = 18      # GPIO pin connected to the pixels (must support PWM!).
  LED_FREQ_HZ    = 800000  # LED signal frequency in hertz (usually 800khz)
  # LED_DMA        = 5       # DMA channel to use for generating signal (try 5)
  LED_BRIGHTNESS = 255     # Set to 0 for darkest and 255 for brightest
  LED_INVERT     = False   # True to invert the signal (when using NPN transistor level shift)
  LED_CHANNEL    = 0
  # LED_STRIP      = ws.SK6812_STRIP_RGBW
  
  
  class NeoPixelRenderer(Renderer):
      def __init__(self, led_dma=10, led_strip=ws.SK6812W_STRIP):
          super(NeoPixelRenderer, self).__init__()
  
          self.led_dma = 10
          self.led_strip = led_strip
          self.strip = None
  
      def setup(self, pixel_count, world):
          super(NeoPixelRenderer, self).setup(pixel_count, world)
  
          self.strip = Adafruit_NeoPixel( pixel_count,
                                          LED_PIN,
                                          LED_FREQ_HZ,
                                          self.led_dma,
                                          LED_INVERT,
                                          LED_BRIGHTNESS,
                                          LED_CHANNEL,
                                          self.led_strip)
  
          self.strip.begin()
  
          for idx, pixel in enumerate(self.pixel_count):
              self.strip.setPixelColorRGB(idx, 0, 0, 0, 0)
  
          self.strip.show()
  
      def render_buffer(self, pixel_buffer):
          super(NeoPixelRenderer, self).render_buffer()
  
          for idx, pixel in enumerate(pixel_buffer):
              self.strip.setPixelColorRGB(idx, int(pixel.r), int(pixel.g), int(pixel.b))  # , int(pixel.w))
  
          self.strip.show()
  
new_contents: from display import Renderer
  from neopixel import Adafruit_NeoPixel
  import _rpi_ws281x as ws
  
  # LED strip configuration:
  # LED_COUNT      = 40      # Number of LED pixels.
  LED_PIN        = 18      # GPIO pin connected to the pixels (must support PWM!).
  LED_FREQ_HZ    = 800000  # LED signal frequency in hertz (usually 800khz)
  # LED_DMA        = 5       # DMA channel to use for generating signal (try 5)
  LED_BRIGHTNESS = 255     # Set to 0 for darkest and 255 for brightest
  LED_INVERT     = False   # True to invert the signal (when using NPN transistor level shift)
  LED_CHANNEL    = 0
  # LED_STRIP      = ws.SK6812_STRIP_RGBW
  
  
  class NeoPixelRenderer(Renderer):
      def __init__(self, led_dma=10, led_strip=ws.SK6812W_STRIP):
          super(NeoPixelRenderer, self).__init__()
  
          self.led_dma = 10
          self.led_strip = led_strip
          self.strip = None
  
      def setup(self, pixel_count, world):
          super(NeoPixelRenderer, self).setup(pixel_count, world)
  
          self.strip = Adafruit_NeoPixel( pixel_count,
                                          LED_PIN,
                                          LED_FREQ_HZ,
                                          self.led_dma,
                                          LED_INVERT,
                                          LED_BRIGHTNESS,
                                          LED_CHANNEL,
                                          self.led_strip)
  
          self.strip.begin()
  
          for idx in range(0, pixel_count):
              self.strip.setPixelColorRGB(idx, 0, 0, 0, 0)
  
          self.strip.show()
  
      def render_buffer(self, pixel_buffer):
          super(NeoPixelRenderer, self).render_buffer(pixel_buffer)
  
          for idx, pixel in enumerate(pixel_buffer):
              self.strip.setPixelColorRGB(idx, int(pixel.r), int(pixel.g), int(pixel.b))  # , int(pixel.w))
  
          self.strip.show()
  
subject: update led display to use proper renderer object changes