from machine import Pin,PWM,ADC
from utime import sleep
ldr=ADC(28)
pwm=PWM(Pin(15))
print("hello, pi pico!")
pwm.freq(1000)
while True:
    value=ldr.read_u16()
    print(value)
    pwm.duty_u16(value) #pulse width modulation
    if value<5000:
        print("low")
        sleep(0.001)
    elif value>5000:
        print("better")
        sleep(0.001)