int LEDpin = 11;
int buttonPin = 2;
int time = 50;
int steps = 20;

void setup()
{
  Serial.begin(9600);
  pinMode(LEDpin, OUTPUT);
  pinMode(buttonPin, INPUT);
  digitalWrite(LEDpin, LOW);
}

void loop()
{
  int buttonState=digitalRead(buttonPin);
  Serial.print("Nupu v22rtus on: ");
  Serial.println(buttonState);
  if(buttonState == HIGH ){
  	fadeIn(steps);
  	fadeOut(steps);
  }
}

void fadeIn(int steps){
  int brightness=0;
  analogWrite(LEDpin, brightness);
  for(int i=0; i<=steps; i++){
    brightness=i*int(255/steps);
    analogWrite(LEDpin, brightness);
    delay(time);
  }
}

void fadeOut(int steps){
  int brightness=255;
  analogWrite(LEDpin, brightness);
  for(int i=steps; i>=0; i--){
    brightness=i*int(255/steps);
    analogWrite(LEDpin, brightness);
    delay(time);
  }
}