from machine import Pin
from neopixel import NeoPixel
from time import sleep
from math import sin, pi

pixel_pin  = 22
num_pixels = 80

pixels = NeoPixel(Pin(pixel_pin ), num_pixels)
print(pi,sin(pi/2))
r=g=b=0
dw =  2*pi/num_pixels
print(dw)
while True:
    # pixels.fill((255, 0, 0)); pixels.write(); sleep(1)
    # pixels.fill((0, 255, 0)); pixels.write(); sleep(1)
    # pixels.fill((0, 0, 255)); pixels.write(); sleep(1)

    for j in range(0,num_pixels):
        for i in range(num_pixels):
            r =   0 + int(127*sin(3*i*dw))
            g = 160 + int(95*sin(2*i*dw+pi/3))
            b = 160 + int(95*sin(2*i*dw+pi/6))
            pixels[(i+j) % num_pixels] = (r,g,b)
            #print(" %5.3f" % (r), end =" ")
            #print(" %4d" % (r), end =" ")
            #print(r+b+g, end =" ")

        print()
        pixels.write()
        #sleep(0.1)

"""
            r = (  0 + j  + i * 16 ) % 256
            g = ( 80 + j  + i *  8) % 256
            b = (160 + j  + i *  4  ) % 256
"""

"""
            r = 128 + int(127*sin(3*i*dw))
            g = 160 + int(95*sin(2*i*dw+pi/3))
            b = 160 + int(95*sin(2*i*dw+pi/6))

"""