int led_1 = 16;
int led_2 = 17;
int led_3 = 18;
int led_4 = 19;
int led_5 = 21;

#define LIGHT_SENSOR_PIN 36 // ESP32 pin GIOP36 (ADC0)

void setup()

 {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  pinMode(16,OUTPUT);
  pinMode(17,OUTPUT);
  pinMode(18,OUTPUT);
  pinMode(19,OUTPUT);
  pinMode(21,OUTPUT);

}

void loop()

 {
  // reads the input on analog pin (value between 0 and 4095)
  int analogValue = analogRead(LIGHT_SENSOR_PIN);

  Serial.print("Analog Value = ");
  Serial.print(analogValue);   // the raw analog reading

  // We'll have a few threshholds, qualitatively determined
  if (analogValue < 100) 
  {
    Serial.println(" => Dark");
    digitalWrite(16,1);
  } 
  else if (analogValue < 300) 
  {
    Serial.println(" => Dim");
    digitalWrite(17,1);
  } 
  else if (analogValue < 2000)
  
   {
    Serial.println(" => Light");
    digitalWrite(18,1);
  }
   else if (analogValue < 3200) 
   {
    Serial.println(" => Bright");
    digitalWrite(19,1);
  }
   else 
   {
    Serial.println(" => Very bright");
    digitalWrite(21,1);
    
  }

  delay(100);
}