import machine, neopixel
import time

n = 48
p = 17
red = (255,0,0)
green = (0,255,0)
blue = (0,0,255)

np = neopixel.NeoPixel(machine.Pin(p), n)

while True:
    for i in range(0, 16):
        np[i] = (green)
        np.write()
        time.sleep(0.5)
        np[i] = (0,0,0)