//Date: 17.09.2025
//Name: Rajaram Parida
//Redg: 2241016203
//Section: 28
//Exp. No.: 5.1

int brightness = 0;
int fadeAmount = 25;
int buttonState = 0;
int lastButtonState = 0;
bool increasing = true;

void setup() {
  pinMode(9, OUTPUT);
  pinMode(8, INPUT);
  Serial.begin(9600);
}

void loop() {
  buttonState = digitalRead(8);

  if (buttonState == HIGH && lastButtonState == LOW) {
    if (increasing) {
      brightness += fadeAmount;
      if (brightness >= 255) {
        brightness = 255;
        increasing = false;
      }
    } else {
      brightness -= fadeAmount;
      if (brightness <= 0) {
        brightness = 0;
        increasing = true;
      }
    }

    analogWrite(9, brightness);
    Serial.print("Brightness: ");
    Serial.println(brightness);
    delay(200);
  }

  lastButtonState = buttonState;
}