main.py

import neopixel, math, time


from machine import Pin
p = Pin(28, Pin.OUT)
px = neopixel.NeoPixel(p,24)

theta = [0.0,0.0,0.0]
delta = [2.1,1.3,-1.5]

while True:
    theta = [(theta[i] + delta[i] / 10.0) % (math.pi * 2) for i in range(3)]
    for i in range(24):
        rho = i * math.pi / 12
        px[i] = [
                 128+int(128*math.cos(rho + theta[0])),
                 128+int(128*math.cos(rho + theta[1])),
                 128+int(128*math.cos(rho + theta[2]))
                 ]
    px.write()
    time.sleep_ms(1)