# neopixel on off 22 Nov 2022 @squadshaaht
import time, random
import board
from rainbowio import colorwheel
import neopixel

print("Hello, Pi Pico!")

num_leds = 16
leds = neopixel.NeoPixel(board.GP28, num_leds, brightness=1.0, auto_write=True )

my_hue = 0
pos = 0 # where on ring we are
while True:
  for i in range(num_leds):
        for j in range(i):
            leds[j] = 0xff0000
            leds.show()
            time.sleep(0.1)

        leds.fill(0x000000)
        leds.show()
        time.sleep(0.1)




  # leds[0:pos] = [colorwheel( my_hue )] * (pos)
  # time.sleep(0.5)
  # leds[:] = [0] * num_leds
  # time.sleep(0.5)
  # pos = (pos+1) % num_leds  # move to next position