1  # SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  import time
 6  from rainbowio import colorwheel
 7  import adafruit_dotstar
 8  import board
 9  
10  # For Trinket M0, Gemma M0, and ItsyBitsy M0 Express
11  led = adafruit_dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1)
12  
13  
14  # For Feather M0 Express, Metro M0 Express, and Circuit Playground Express
15  # led = neopixel.NeoPixel(board.NEOPIXEL, 1)
16  
17  led.brightness = 0.3
18  
19  i = 0
20  while True:
21      i = (i + 1) % 256  # run from 0 to 255
22      led.fill(colorwheel(i))
23      time.sleep(0.1)