from machine import Pin
from neopixel import NeoPixel
import time
Pin = Pin(33,Pin.OUT)
NUM = 16
np=NeoPixel(Pin,NUM)
red=(255,0,0)
green=(0,255,0)
blue=(0,0,255)
black=(0,0,0)
for i in range(16):
if i % 2==0:
np[i]=red
np.write()
time.sleep(0.5)
else:
np[i]=black
np.write()
for i in range(15,-1,-1):
np[i]=black
np.write()
time.sleep(0.1)