from machine import *
from utime import sleep_ms

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

led1.Freq(1000)
led2.Freq(1000)

for brightness in range(0,65535,50):
    led.duty_u16(brightness)
    sleep_ms(10)
    led1.duty_u16(brightness)
    sleep_ms(10)

led.duty_u16(0)
led1.duty_u16(0)