1  """ Simple FancyLED example for NeoPixel strip
 2  """
 3  
 4  import board
 5  import neopixel
 6  import adafruit_fancyled.adafruit_fancyled as fancy
 7  
 8  num_leds = 20
 9  
10  # Declare a 6-element RGB rainbow palette
11  palette = [
12      fancy.CRGB(1.0, 0.0, 0.0),  # Red
13      fancy.CRGB(0.5, 0.5, 0.0),  # Yellow
14      fancy.CRGB(0.0, 1.0, 0.0),  # Green
15      fancy.CRGB(0.0, 0.5, 0.5),  # Cyan
16      fancy.CRGB(0.0, 0.0, 1.0),  # Blue
17      fancy.CRGB(0.5, 0.0, 0.5),
18  ]  # Magenta
19  
20  # Declare a NeoPixel object on pin D6 with num_leds pixels, no auto-write.
21  # Set brightness to max because we'll be using FancyLED's brightness control.
22  pixels = neopixel.NeoPixel(board.D6, num_leds, brightness=1.0, auto_write=False)
23  
24  offset = 0  # Positional offset into color palette to get it to 'spin'
25  
26  while True:
27      for i in range(num_leds):
28          # Load each pixel's color from the palette using an offset, run it
29          # through the gamma function, pack RGB value and assign to pixel.
30          color = fancy.palette_lookup(palette, offset + i / num_leds)
31          color = fancy.gamma_adjust(color, brightness=0.25)
32          pixels[i] = color.pack()
33      pixels.show()
34  
35      offset += 0.02  # Bigger number = faster spin