from machine import Pin, PWM
import utime


LED_PIN = 7       
BUTTON_PIN = 15    

led = PWM(Pin(LED_PIN))
led.freq(1000)   
button = Pin(BUTTON_PIN, Pin.IN, Pin.PULL_DOWN)
brightness_levels = [0, 16384, 32768, 49152, 65535]  
index = 0
print("Press button to increase LED brightness step by step.")

while True:
    if button.value() == 1:   
        utime.sleep_ms(200)  
        index = (index + 1) % len(brightness_levels)
        led.duty_u16(brightness_levels[index])
        print("Brightness:", brightness_levels[index])
    utime.sleep_ms(50)