import time
import machine, neopixel
lednumber = 8

np = neopixel.NeoPixel(machine.Pin(14), lednumber)

def demo(np):
    n = np.n

    # cycle
    for i in range(4 * n):
        for j in range(n):
            np[j] = (0, 0, 0)
        np[i % n] = (255, 255, 255)
        np.write()
        time.sleep_ms(25)

    # bounce
    for i in range(4 * n):
        for j in range(n):
            np[j] = (0, 0, 128)
        if (i // n) % 2 == 0:
            np[i % n] = (0, 0, 0)
        else:
            np[n - 1 - (i % n)] = (0, 0, 0)
        np.write()
        time.sleep_ms(60)

    # fade in/out
    for i in range(0, 4 * 256, 8):
        for j in range(n):
            if (i // 256) % 2 == 0:
                val = i & 0xff
            else:
                val = 255 - (i & 0xff)
            np[j] = (val, 0, 0)
        np.write()

    # clear
    for i in range(n):
        np[i] = (0, 0, 0)
    np.write()

def npcolor(r, g, b):

  for i in range(lednumber):
    np[i] = (r, g, b)
  np.write()

def npcycle():

    for i in range(2 * lednumber):
        for j in range(lednumber):
            np[j] = (0, 0, 0)
        np[i % lednumber] = (126, 20, 126)
        np.write()
        time.sleep_ms(150)

npcolor(0,0,0)
npcycle()
npcolor(0,0,0)
#demo(np)