#script that changes the led brightness ,over time by increasing/decreasing 
# the duty cycle

#frequecny must be from 1 Hz to 40 MHz

from machine import Pin,PWM
from time import sleep

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

while True:
    for duty_cycle in range(0,1023,1):
        led.duty(duty_cycle)
        print(duty_cycle)
        sleep(0.009)
                                
    for duty_cycle in range(1023,0,-1):
        led.duty(duty_cycle)
        print(duty_cycle)
        sleep(0.009)