#include <Servo.h>

Servo myServo;  // Declare a servo object

int servoPin = 9;  // Digital pin for servo
int lightPin = A4; // Analog pin for photoresistor

int angle;  // Variable to store servo angle
int lightVal; // Variable to store photoresistor reading

void setup() {
  myServo.attach(servoPin);  // Attach the servo to the specified pin
  pinMode(lightPin, INPUT);  // Set the light pin as an input
  Serial.begin(9600);  // Initialize serial communication
}

void loop() {
  lightVal = analogRead(lightPin);  // Read the photoresistor value
  angle = calculateAngle(lightVal); // Calculate the corresponding angle
  myServo.write(angle);  // Set the servo angle
  Serial.println(angle);  // Print angle for debugging
  delay(250);  // Delay for stability
}

int calculateAngle(int lightValue) {
  // Mapping light values to servo angles using linear equation
  return -16.0 / 63.0 * lightValue + 16.0 * 780.0 / 63.0;
}