const int LDR_PIN =34;  // Define the pin connected to the LDR
const int LED1 =12;  // Define the pin connected to the LED
const int LED2 =13;
const int LED3 =14;
const int LED4 =32;

void setup()
{
  pinMode(LDR_PIN,INPUT);
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(LED4,OUTPUT);
}

void loop()

{
  int sensorValue=analogRead(LDR_PIN);  // Read the LDR value (0-4095)
  int brightness =map(sensorValue,0,4095,0,255);// Map to LED brightness (0-255)


  if (sensorValue<1000)

  {
    digitalWrite(LED1,HIGH);
    digitalWrite(LED2,HIGH);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,HIGH);
    delay(1000);
  }

  else if(sensorValue<2000)
  {
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,HIGH);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,HIGH);
    delay(1000);
  }
  else if(sensorValue<3000)
  {
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,HIGH);
    delay(1000);
  }
  else if(sensorValue<4000)
  {
   digitalWrite(LED1,LOW);
   digitalWrite(LED2,LOW);
   digitalWrite(LED3,LOW);
   digitalWrite(LED4,HIGH); 
   delay(1000);
  }
  else if(sensorValue<10000)
  {
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,LOW);
    digitalWrite(LED4,LOW);
    delay(1000);
  }
}