const int buttonPin1 = 2;  
const int buttonPin2 = 3;  
const int ledPin = 10;     

int pwmValue = 0;        

void setup() {
  
  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
  
 Serial.begin(9600);
}

void loop() {

  int buttonState1 = digitalRead(buttonPin1);
  int buttonState2 = digitalRead(buttonPin2);
  
   if (buttonState1 == HIGH) {
    pwmValue += 10;
    if (pwmValue > 255) {
      pwmValue = 255;  
    }
    delay(200); 
  }

  if (buttonState2 == HIGH) {
    pwmValue -= 10;
    if (pwmValue < 0) {
      pwmValue = 0; 
    }
    delay(200); 

  }
  analogWrite(ledPin, pwmValue);
  
  Serial.print("PWM Value: ");
  Serial.println(pwmValue);
}