new_contents: # NeoPixel library strandtest example
  # Author: Tony DiCola (tony@tonydicola.com)
  #
  # Direct port of the Arduino NeoPixel library strandtest example.  Showcases
  # various animations on a strip of NeoPixels.
  import time
  
  from neopixel import *
  
  # LED strip configuration:
  LED_COUNT = 300  # Number of LED pixels.
  LED_PIN = 18  # GPIO pin connected to the pixels (18 uses PWM!).
  # LED_PIN        = 10      # GPIO pin connected to the pixels (10 uses SPI /dev/spidev0.0).
  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  # set to '1' for GPIOs 13, 19, 41, 45 or 53
  LED_STRIP = ws.WS2811_STRIP_GRB  # Strip type and colour ordering
  
  
  # Define functions which animate LEDs in various ways.
  
  def twinkle(strip, color, wait_ms=100):
      while True:
          for i in range(strip.numPixels / 30):
              strip.setPixelColor(i, color)
              strip.show()
              time.sleep(wait_ms / 1000)
  
  
  def colorWipe(strip, color, wait_ms=50):
      """Wipe color across display a pixel at a time."""
      for i in range(strip.numPixels()):
          strip.setPixelColor(i, color)
          strip.show()
          time.sleep(wait_ms / 1000.0)
  
  
  def theaterChase(strip, color, wait_ms=50, iterations=10):
      """Movie theater light style chaser animation."""
      for j in range(iterations):
          for q in range(3):
              for i in range(0, strip.numPixels(), 3):
                  strip.setPixelColor(i + q, color)
              strip.show()
              time.sleep(wait_ms / 1000.0)
              for i in range(0, strip.numPixels(), 3):
                  strip.setPixelColor(i + q, 0)
  
  
  def wheel(pos):
      """Generate rainbow colors across 0-255 positions."""
      if pos < 85:
          return Color(pos * 3, 255 - pos * 3, 0)
      elif pos < 170:
          pos -= 85
          return Color(255 - pos * 3, 0, pos * 3)
      else:
          pos -= 170
          return Color(0, pos * 3, 255 - pos * 3)
  
  
  def rainbow(strip, wait_ms=20, iterations=1):
      """Draw rainbow that fades across all pixels at once."""
      for j in range(256 * iterations):
          for i in range(strip.numPixels()):
              strip.setPixelColor(i, wheel((i + j) & 255))
          strip.show()
          time.sleep(wait_ms / 1000.0)
  
  
  def rainbowCycle(strip, wait_ms=20, iterations=5):
      """Draw rainbow that uniformly distributes itself across all pixels."""
      for j in range(256 * iterations):
          for i in range(strip.numPixels()):
              strip.setPixelColor(i, wheel((int(i * 256 / strip.numPixels()) + j) & 255))
          strip.show()
          time.sleep(wait_ms / 1000.0)
  
  
  def theaterChaseRainbow(strip, wait_ms=50):
      """Rainbow movie theater light style chaser animation."""
      for j in range(256):
          for q in range(3):
              for i in range(0, strip.numPixels(), 3):
                  strip.setPixelColor(i + q, wheel((i + j) % 255))
              strip.show()
              time.sleep(wait_ms / 1000.0)
              for i in range(0, strip.numPixels(), 3):
                  strip.setPixelColor(i + q, 0)
  
  
  # Main program logic follows:
  if __name__ == '__main__':
      # Create NeoPixel object with appropriate configuration.
      strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL,
                                LED_STRIP)
      # Intialize the library (must be called once before other functions).
      strip.begin()
  
      print('Press Ctrl-C to quit.')
      twinkle(strip, Color(127,127,127,))
  
subject: add twinkle effect