fireplace.py

#!/usr/bin/env python

import time
import random
import colorsys
import numpy as np
import rainbowhat as rainbow

rainbow.rotation(0)
rainbow.brightness(1.0)
WIDTH, NUM_PIXELS = rainbow.get_shape()
start = 0
end = 60

while True:
    for py in random.sample(([x for x in range(WIDTH)]), WIDTH):
        wait = np.random.choice(
            np.random.noncentral_chisquare(5, 1, 1000), 1)[0] / 5000
        n = np.random.choice(np.random.noncentral_chisquare(5, 0.1, 1000), 1)
        limit = int(n[0]) 

        if limit > NUM_PIXELS:
            limit = NUM_PIXELS

        for px in range(NUM_PIXELS):
            if px > limit:
                r, g, b = 0, 0, 0
            else:
                hue = start + (((end - start) / float(NUM_PIXELS)) * px)
                r, g, b = [int(c * 255) 
                    for c in colorsys.hsv_to_rgb(hue / 360.0, 1.0, 1.0)]

            if py % 2 != 0:
                py -= 1
                px = (7 - (px+4)) + 4

            rainbow.set_pixel(px, py/2, r, g, b)
            rainbow.show()
            time.sleep(0.01 / (px + 1))
        time.sleep(wait)