#include <Wire.h> // Include the Wire library for I2C communication
#include <LiquidCrystal_I2C.h>
#include <Servo.h> // Include the Servo library

#define LDR_PIN A0 // Change LDR_PIN to the appropriate analog pin for your LDR
#define SERVO_PIN 9 // Define the pin for the servo
#define LED1_PIN 5 // Define the pin for the first LED
#define LED2_PIN 7 // Define the pin for the second LED

LiquidCrystal_I2C lcd(0x27, 20, 4);
Servo myServo; // Create a Servo object

void setup() {
  pinMode(LDR_PIN, INPUT);
  pinMode(LED1_PIN, OUTPUT); // Set LED1_PIN as output
  pinMode(LED2_PIN, OUTPUT); // Set LED2_PIN as output
  lcd.init();
  lcd.backlight();
  lcd.begin(20, 4); // Initialize LCD screen for 20x4 display
  myServo.attach(SERVO_PIN); // Attach the servo to the defined pin
  Serial.begin(9600); // Start the serial communication
}

void loop() {
  int ldrValue = analogRead(LDR_PIN); // Read LDR value

  // Print the LDR value to the Serial Monitor
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  lcd.clear(); // Clear the LCD display before printing new values
  lcd.setCursor(0, 0);
  lcd.print("LDR Value: ");
  lcd.print(ldrValue);

  lcd.setCursor(0, 1);
  lcd.print("Room: ");
  
  if (ldrValue < 500) { // Adjust threshold based on your LDR
    lcd.print("Dark  ");
    
    // Move servo like a worm
    for (int pos = 0; pos <= 90; pos += 1) { // Sweep from 0 to 90 degrees
      myServo.write(pos); // Move the servo to the current position
      delay(3); // Reduced delay for faster movement
    }
    for (int pos = 90; pos >= 0; pos -= 1) { // Sweep from 90 to 0 degrees
      myServo.write(pos); // Move the servo to the current position
      delay(3); // Reduced delay for faster movement
    }
    
    // Turn LEDs on
    digitalWrite(LED1_PIN, LOW);
    digitalWrite(LED2_PIN, LOW);
    
  } else {
    lcd.print("Light!");
    myServo.write(0); // Reset servo to 0 degrees when it's light
    
    // Turn LEDs off
    digitalWrite(LED1_PIN, HIGH);
    digitalWrite(LED2_PIN, HIGH);
  }

  delay(100); // Adjust delay as necessary
}