from machine import Pin, PWM
from utime import sleep

led_pin = 16
button_pin = 17
led = PWM(Pin(led_pin, Pin.OUT))
button = Pin(button_pin, Pin.IN, Pin.PULL_UP)

led.freq(100)
led_brite=0

while True:
    sleep(0.02)
    if button.value() == 0:
        if led_brite < 100:
            led_brite+=1
    else:
        if led_brite > 0:
            led_brite-=1
    print(f"{led_brite=}")
    led.duty_u16(int(65535/100*led_brite))