print("Hello, ESP32!")
from machine import Pin,PWM
from time import sleep_ms

led = PWM(Pin(12,Pin.OUT),freq = 1000)

while True:
    for i in range(1024):
        led.duty(i)
        sleep_ms(1)
    for i in range(1023,0,-1):
        led.duty(i)
        sleep_ms(1)