Arduino LED Dice

// Arduino LED Dice
// Made by Aleksandar Tsvetkov
// Using button debouncing logic from the Internet!
// Available on Instructables, just search it :)

const int pins[6] = {2, 4, 6, 8, 10, 12};
int buttonPin = 13, buttonStatus, randNum, lastNum, i, lastDebounceTime, debounceDelay = 150;

void draw(int randN);

void setup() {
  for (i = 0; i <= 5; i++) {
    pinMode(pins[i], OUTPUT);
  }
  pinMode(buttonPin, INPUT);
}

void loop() {
  buttonStatus = digitalRead(buttonPin);

  if (buttonStatus == HIGH && (millis() - lastDebounceTime) > debounceDelay) {
    do {
      randNum = random(1, 6);
    } while (lastNum == randNum);

    draw(randNum);
    lastDebounceTime = millis();
    lastNum = randNum;
  }
  delay(100);
}

void draw(int randN) {
  for (i = 0; i <= 5; i++) {
    digitalWrite(pins[i], LOW);
  }
  for (i = 0; i <= randN; i++) {
    digitalWrite(pins[i], HIGH);
  }
}