#include <Arduino.h>

const int LED1 = 21; // set pin for the first LED
const int LED2 = 22; // set pin for the second LED
const int LDR = 32;  // set pin for photoresistor (use pin number 35 for GPIO35 on ESP32)

int inputval = 0; // variable for values to be read from LDR
int outval = 0;    // variable for output value from LDR

void setup() {
  // Initialize pinModes
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LDR, INPUT);
}

void loop() {
  // Read LDR value
  inputval = analogRead(LDR);
  
  // Map the 12-bit analog input to the 8-bit PWM range
  outval = map(inputval, 0, 4095, 0, 255);

  // Constrain output values within 0-255 range
  int lightval = constrain(outval, 0, 255);

  // Write the value to the first LED
  analogWrite(LED1, lightval);

  // Write the value to the second LED
  analogWrite(LED2, lightval);

  delay(10);
}