// Define the pin number for the push button
const int buttonPin1 = 8;
const int buttonPin2 = 9;

const int ledPin = 10;
const int buzzPin = 11;

int buttonState1 = LOW;
int buttonState2 = LOW;

int brightness = 0;
int fadeAmount = 25;

int dt = 100;

// Setup function runs once when the program starts
void setup() {
  // Set the button pin as an input with an internal pull-up resistor
  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzPin, OUTPUT);

  // Start the serial monitor at 9600 baud
  Serial.begin(9600);
}

// The loop function runs repeatedly after setup()
void loop() {
  // Read the current state of the button (HIGH or LOW)
  buttonState1 = digitalRead(buttonPin1);
  buttonState2 = digitalRead(buttonPin2);

  Serial.print(" Button 1 = ");
  Serial.println(buttonState1);
  Serial.print(" Button 2 = ");
  Serial.println(buttonState2);

  delay(dt);

    // Check if the button1 is currently pressed (LOW)
    if (buttonState1 == LOW) {

      brightness += fadeAmount;
      if(brightness > 255)
      {
        brightness = 255;
        digitalWrite(buzzPin, HIGH);
        delay(dt);
        digitalWrite(buzzPin, LOW);
        //tone(buzzPin,1000,100);
        Serial.println("WARNING: Maximum Intensity of LED");
      }
    }
    // Check if the button2 is currently pressed (LOW)
    if (buttonState2 == LOW) {

      brightness -= fadeAmount;
      if(brightness < 0)
      {
        brightness = 0;
        digitalWrite(buzzPin, HIGH);
        delay(dt);
        digitalWrite(buzzPin, LOW);
        Serial.println("WARNING: MINIMUM Intensity of LED");
      }    

      
  }
  Serial.print("Brightness :- ");
Serial.println(brightness);
    analogWrite(ledPin, brightness);
}