#include <Servo.h>

Servo myServo;

const int potPin = A0;   
const int servoPin = 9;  
const int ledPin = 3;   
const int btnPin = 2;   

int targetAngle = 90;   
int currentAngle = 90;  

void setup() {
  myServo.attach(servoPin);
  pinMode(ledPin, OUTPUT);
  pinMode(btnPin, INPUT_PULLUP);
  myServo.write(currentAngle);
}

void loop() {
  
  int potValue = analogRead(potPin);
  targetAngle = map(potValue, 0, 1023, 0, 180);

 
  if (digitalRead(btnPin) == LOW) {
    targetAngle = 90;
  }

  
  if (currentAngle < targetAngle) currentAngle++;
  else if (currentAngle > targetAngle) currentAngle--;

  myServo.write(currentAngle);

  
  int distanceFromCenter = abs(currentAngle - 90);
  int ledBrightness = map(distanceFromCenter, 0, 90, 0, 255);
  analogWrite(ledPin, ledBrightness);

  delay(10); 
}