IntList Lottery example

IntList lottery;
IntList results;
IntList ticket;
void showList(IntList& list, float x, float y) {
  for (int i = 0; i < list.size(); i++) {
    int val = list.get(i);
    stroke(255);
    noFill();
    ellipse(x + i * 32, y, 24, 24);
    textAlign(CENTER);
    fill(255);
    text(val, x + i * 32, y + 6);
  }
}
void setup() {
  size(640, 360);
  frameRate(30);
  for (int i = 0; i < 20; i++) {
    lottery.append(i);
  }
  for (int i = 0; i < 5; i++) {
    int index = (int)random(lottery.size());
    ticket.append(lottery.get(index));
  }
}
void draw() {
  background(51);
  lottery.shuffle();
  showList(lottery, 16, 48);
  showList(results, 16, 100);
  showList(ticket, 16, 140);
  for (int i = 0; i < results.size(); i++) {
    if (results.get(i) == ticket.get(i)) {
      fill(0, 255, 0, 100);
    } else {
      fill(255, 0, 0, 100);
    }
    ellipse(16 + i * 32, 140, 24, 24);
  }
  if (frameCount % 30 == 0) {
    if (results.size() < 5) {
      int val = lottery.get(0);
      lottery.remove(0);
      results.append(val);
    } else {
      for (int i = 0; i < results.size(); i++) {
        lottery.append(results.get(i));
      }
      results.clear();
    }
  }
}