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| import board
import time
import neopixel
from touchio import TouchIn
touch = TouchIn(board.A2)
# LED strip
pixels = neopixel.NeoPixel(board.D1, 3, brightness=1,
auto_write=True, pixel_order=neopixel.GRBW)
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):
return [0, 0, 0]
if (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)]
on = False
i = 0
while True:
if touch.value:
on = not on
while touch.value:
pass
if on:
pixels[0] = wheel(i)
pixels[1] = (0, 255, 255, 0)
pixels[2] = (0, 0, 0, 255)
else:
pixels.fill((0, 0, 0, 0))
i = (i+1) % 256
|