#wmps that changes the LED brightness over time by inc/decreasing the duty cycle.
from machin import Pin, PWM
from time import sleep

frequency=5000
led=PWM(Pin(5),frequency)

while True:
    for duty_cycle in range(0, 1024, 1):
        led.duty(duty_cycle)
        print(duty_cycle)
        sleep(0.005)
    for duty_cycle in range (1023,0,-1):
        led.duty(duty_cycle)
        print(duty_cycle)
        sleep(0.005)