from machine import Pin,PWM
from time import sleep_ms
PWM2= PWM (Pin(2))
print("PWM frequncy", PWM2.freq())
print("PWM Duty Cycle",PWM2.duty())
while True:
    for x in range(1,1023,5):
        PWM2.duty(x)
        sleep_ms(10)
    for x in range(1023,0,-5):
        PWM2.duty(x)
        sleep_ms(100)