from machine import Pin, PWM, ADC
from time import sleep

leds = [ PWM(Pin(i)) for i in range(4, 12) ]
ldr = ADC(Pin(28))

for led in leds:
    led.freq(10000)

def lights(x):
    p = (65007 - 512) / 8

    for i in range(0, 9):
        if x >= i * p and x < (i + 1) * p:
            for j in range(0, i):
                leds[j].duty_u16(x // (2 ** (i - j - 1)))
            for j in range(i, 8):
                leds[j].duty_u16(0)
            break

while True:
    lights(ldr.read_u16())
    sleep(0.02)