from machine import Pin
from time import sleep

led_pins = [Pin(5, Pin.OUT), Pin(18, Pin.OUT), Pin(19, Pin.OUT)]
btn_pins = [Pin(25, Pin.IN, Pin.PULL_UP), Pin(14, Pin.IN, Pin.PULL_UP), Pin(13, Pin.IN, Pin.PULL_UP)]

while True:
    pressed_count = 0
    for btn in btn_pins : 
        pressed_count += not btn.value()

    # Turn LEDs on according to pressed_count
    for i, led in enumerate(led_pins):
        if i < pressed_count :
            led.value(1)
        else :
            led.value(0)

    sleep(0.1)  # small delay to reduce CPU usage