int led = 10;
  int button1 = 8;
  int button2 = 9;


  int buttonState1 = 0;
  int buttonState2 = 0;
  int brightness = 0;
  int brightUp = 10;



  void setup() {
    pinMode(led, OUTPUT);
    pinMode(button1, INPUT);
    pinMode(button2, INPUT);
    Serial.begin(9600);
  }

  void loop() {
    analogWrite(led, brightness);
    Serial.println(brightness);

    buttonState1 = digitalRead(button1);
    buttonState1 = digitalRead(button2);


    if (buttonState1 == HIGH) {
      brightness = brightness + brigthUp;
       if (brightness > 255) {
          brightness == 255;
       }
       delay(100);
    }
    if (buttonState1 == HIGH) {
      brightness = brightness + brigthUp;
       if (brightness < 0) {
          brightness == 0;
       }
       delay(100);
    }
  }