int LedPin[4] = {8, 9, 10, 11};

const int buttonPin = 13;

int pushCounter = 0;
int buttonState = HIGH;
int lastButtonState = HIGH;

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);

  for (int i = 0; i < 4; i++) {
    pinMode(LedPin[i], OUTPUT);
    digitalWrite(LedPin[i], LOW);
  }
}

void loop() {

  buttonState = digitalRead(buttonPin);

  // Detect one button press
  if (buttonState == LOW && lastButtonState == HIGH) {

    pushCounter++;

    // Reset after 4 LEDs
    if (pushCounter > 4) {
      pushCounter = 0;
    }

    // Control LEDs
    for (int i = 0; i < 4; i++) {

      if (i < pushCounter) {
        digitalWrite(LedPin[i], HIGH);
      } 
      else {
        digitalWrite(LedPin[i], LOW);
      }
    }

    delay(50);   // debounce
  }

  lastButtonState = buttonState;
}