from machine import Pin
from neopixel import NeoPixel
from time import sleep,sleep_ms
from random import randint
np = NeoPixel(Pin(16, Pin.OUT), 8)

col1 = (255, 0, 0)
col2 = (0, 255, 0)
col3 = (0, 0, 255)

def fill(color):
    for i in range(8):
        np[i] = color
    np.write()

def breath(color,delay=5):
    r,g,b = color
    for i in range(0, 256, 5):
        fill((int(r*i/255), int(g*i/255), int(b*i/255)))
        sleep_ms(10)
    for i in range(255, -1, -5):
        fill((int(r*i/255), int(g*i/255), int(b*i/255)))
        sleep_ms(10)

while 1:
    r = randint(0,255)
    g = randint(0,255)
    b = randint(0,255)
    #breath((r,g,b))
    breath(col1)