from machine import *
from utime import *
red = PWM(Pin(1))
red.freq(1000)
green = PWM(Pin(5))
green.freq(1000)
blue = PWM(Pin(9))
blue.freq(1000)
for bright in range(0, 65535, 100):
red.duty_u16(bright)
sleep_ms(10)
green.duty_u16(bright)
sleep_ms(10)
blue.duty_u16(bright)
sleep_ms(10)
red.duty_u16(0)
green.duty_u16(0)
blue.duty_u16(0)