from machine import *
from utime import sleep_ms

led1=PWM(Pin(5))
led2=PWM(Pin(9))

led1.freq(1000)
led2.freq(1000)

for b in range(0,65535,100):
  led1.duty_u16(b)
  sleep_ms(10)
  led2.duty_u16(b)
  sleep_ms(10)

led1.duty_u16(0)
led2.duty_u16(0)