#write a micropython script to control the brightness of led conncted to  GPio 4
#wrt to the intensity of the light falling on the ldr connected to gpio34(if the
#insenty of sunlight is more brightness of led should be less)
from machine import Pin,PWM,ADC
from time import sleep
led=PWM(Pin(4),5000)#f=1hz to 40 MHz
ldr=ADC(Pin(34))
ldr.width(ADC.WIDTH_10BIT)#Resolution :12bit:0-1023
ldr.atten(ADC.ATTN_11DB)#3.3v
while True:
    x=ldr.read()
    print(x)
    led.duty(x)