#define PIN_SERIELEDATA 12
#define PIN_CLOCK 10
#define PIN_DOORGEEF 11
#define PIN_BUTTON 2

byte cijfers [] = {B11111100,
                   B01100000,
                   B11011010,
                   B11110010,
                   B01100110,
                   B10110110,
                   B10111110,
                   B11100000,
                   B11111110,
                   B11110110
                  };

//byte cijfers [] = {254};

int arraySize = sizeof cijfers / sizeof cijfers [0];
volatile boolean displayState = false;

void checkButton();

void setup() {
  pinMode(PIN_SERIELEDATA, OUTPUT);
  pinMode(PIN_CLOCK, OUTPUT);
  pinMode(PIN_DOORGEEF, OUTPUT);
  pinMode(PIN_BUTTON, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(PIN_BUTTON), checkButton, FALLING);
}

void loop() {
  if (displayState) {
    for (int i = 0; i < arraySize && displayState; i++) {
      digitalWrite(PIN_DOORGEEF, LOW);
      shiftOut(PIN_SERIELEDATA, PIN_CLOCK, LSBFIRST, cijfers[i]);
      digitalWrite(PIN_DOORGEEF, HIGH);
      delay(500);
    }
  } else {
    digitalWrite(PIN_DOORGEEF, LOW);
    shiftOut(PIN_SERIELEDATA, PIN_CLOCK, LSBFIRST, B00000001);
    digitalWrite(PIN_DOORGEEF, HIGH);
  }
}

void checkButton() {
  displayState = !displayState;
}