#script that chnages the LED brightmess over time by increasing/decreasing
#duty cycle.
#frequency must be from 1Hz to 40MHz (1 and 40 000 000)
from machine import Pin,PWM
from time import sleep

frequency=5000
led = PWM(Pin(19),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)