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# CircuitPython demo - NeoPixel
import time
import board
import neopixel
pixpin = board.D1
numpix = 10
strip = neopixel.NeoPixel(pixpin, numpix, brightness=0.3, auto_write=False)
def wheel(pos):
# Input a value 0 to 255 to get a color value.
# The colours are a transition r - g - b - back to r.
if (pos < 0) or (pos > 255):
return (0, 0, 0)
if pos < 85:
return (int(pos * 3), int(255 - (pos * 3)), 0)
elif pos < 170:
pos -= 85
return (int(255 - pos * 3), 0, int(pos * 3))
else:
pos -= 170
return (0, int(pos * 3), int(255 - pos * 3))
def rainbow_cycle(wait):
for j in range(255):
for i in range(len(strip)):
idx = int((i * 256 / len(strip)) + j)
strip[i] = wheel(idx & 255)
strip.write()
time.sleep(wait)
while True:
strip.fill((255, 0, 0))
strip.write()
time.sleep(1)
strip.fill((0, 255, 0))
strip.write()
time.sleep(1)
strip.fill((0, 0, 255))
strip.write()
time.sleep(1)
rainbow_cycle(0.001) # rainbowcycle with 1ms delay per step