from machine import Pin 
import time

led_bar = [
    Pin(16, Pin.OUT), Pin(17, Pin.OUT), Pin(18, Pin.OUT), 
    Pin(19, Pin.OUT), Pin(20, Pin.OUT), Pin(21, Pin.OUT), 
    Pin(22, Pin.OUT), Pin(26, Pin.OUT), Pin(27, Pin.OUT), 
    Pin(28, Pin.OUT)
]
swl = Pin(5, Pin.IN, Pin.PULL_UP)
sw2 = Pin(14, Pin.IN, Pin.PULL_DOWN)
count = 0

while True:
    if not swl.value():  
        if count < len(led_bar):  
            led_bar[count].on()  
            count += 1
        time.sleep(0.2)  
    if  sw2.value():  
        if count > 0:  
            count -= 1
            led_bar[count].off()  
        time.sleep(0.2)  
    time.sleep(0.1)