import time
import neopixel
import machine
from machine import Pin

led=20
np=neopixel.NeoPixel(machine.Pin(2),led)
temps=0.02
color=((255,0,0),(255,255,0),(0,255,0),(0,255,255),(0,0,255),(255,0,255))
bp=Pin(33,Pin.IN)

while True :
    for co in color:
        for c in range(led):
            """if bp(1):
                sens=-1
            else:
                sens=1"""
            np[c*sens]=co
            np.write()
            time.sleep(temps)