import time
from neopixel import Neopixel
import random

numpix = 16  # Number of NeoPixels
# Pin where NeoPixels are connected
strip = Neopixel(numpix, 1, 19, "GRB")

colors_rgb = [
    (232, 100, 255),  # Purple
    (200, 200, 20),  # Yellow
    (30, 200, 200),  # Blue
    (150,50,10),
    (50,200,10),
]

# same colors as normaln rgb, just 0 added at the end
colors_rgbw = [color+tuple([0]) for color in colors_rgb]
colors_rgbw.append((0, 0, 0, 255))

# uncomment colors_rgbw if you have RGBW strip
colors = colors_rgb
# colors = colors_rgbw

max_len=1
min_len = 1
#pixelnum, posn in flash, flash_len, direction
flashing = []

num_flashes = 3

for i in range(num_flashes):
    pix = random.randint(0, numpix - 1)
    col = random.randint(1, len(colors) - 1)
    flash_len = random.randint(min_len, max_len)
    flashing.append([pix, colors[col], flash_len, 0, 1])
    
strip.fill((0,0,0))

while True:
    strip.show()
    for i in range(num_flashes):

        pix = flashing[i][0]
        brightness = (flashing[i][3]/flashing[i][2])
        colr = (int(flashing[i][1][0]*brightness), 
                int(flashing[i][1][1]*brightness), 
                int(flashing[i][1][2]*brightness))
        strip.set_pixel(pix, colr)

        if flashing[i][2] == flashing[i][3]:
            flashing[i][4] = -1
        if flashing[i][3] == 0 and flashing[i][4] == -1:
            pix = random.randint(0, numpix - 1)
            col = random.randint(0, len(colors) - 1)
            flash_len = random.randint(min_len, max_len)
            flashing[i] = [pix, colors[col], flash_len, 0, 1]
        flashing[i][3] = flashing[i][3] + flashing[i][4]
        time.sleep(0.03)