47 lines
1.2 KiB
Python
47 lines
1.2 KiB
Python
# SPDX-FileCopyrightText: 2017 Mikey Sklar for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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import time
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import board
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import neopixel
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try:
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import urandom as random
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except ImportError:
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import random
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numpix = 7 # Number of NeoPixels
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pixpin = board.D1 # Pin where NeoPixels are connected
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strip = neopixel.NeoPixel(pixpin, numpix, brightness=1, auto_write=True)
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colors = [
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[232, 100, 255], # Purple
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[200, 200, 20], # Yellow
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[30, 200, 200], # Blue
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]
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def flash_random(wait, howmany):
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for _ in range(howmany):
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c = random.randint(0, len(colors) - 1) # Choose random color index
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j = random.randint(0, numpix - 1) # Choose random pixel
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strip[j] = colors[c] # Set pixel to color
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for i in range(1, 5):
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strip.brightness = i / 5.0 # Ramp up brightness
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time.sleep(wait)
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for i in range(5, 0, -1):
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strip.brightness = i / 5.0 # Ramp down brightness
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strip[j] = [0, 0, 0] # Set pixel to 'off'
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time.sleep(wait)
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while True:
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# first number is 'wait' delay, shorter num == shorter twinkle
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flash_random(.01, 1)
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# second number is how many neopixels to simultaneously light up
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flash_random(.01, 3)
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flash_random(.01, 2)
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