from machine import Pin,PWM
from time import sleep

led=PWM(Pin(23),50000)
increment=Pin(34,Pin.IN)
decrement=Pin(35,Pin.IN)

intensity=0
while True:
    if increment.value()==1:
        if intensity<(1023-0.25*1023):
            intensity=int(intensity+(0.25*1023))
        else:
            intensity=1023
        print(intensity)
    elif decrement.value()==1:
        if intensity>(0.25*1023):
            intensity=int(intensity-(0.25*1023))
        else:
            intensity=0
        print(intensity)
    led.duty(intensity)
    sleep(1)