from machine import Pin
import time
from neopixel import NeoPixel

pin = Pin(12, Pin.OUT)
np = NeoPixel(pin, 16)

black = (0,0,0)
white = (255,255,255)
red = (255,0,0)
lime = (0,255,0)
blue = (0,0,255)
yellow = (255,255,0)
cyan = (0,255,255)
magenta = (255,0,255)

color = (magenta, cyan, yellow, blue, lime, red, white, black,
         magenta, cyan, yellow, blue, lime, red, white, black)

while 1:
    for i in range(16):
        np[i] = color[i]
        np.write()
        time.sleep_ms(200)

    for i in range(16):
        np[i] = black
        np.write()
        time.sleep_ms(200)