Shows a pseudorandom number sequence and the 2,3 Halton sequence.

Halton.pde

int box_size = 256;

float Halton(int i, int base)
{
  float x = 1.0f / base;
  float v = 0.0f;
  while (i > 0)
  {
    v += x * (i % base);
    i = floor(i / base);
    x /= base;
  }
  return v;
}

void setup()
{
  size(box_size * 2 + 16, box_size + 20);
  background(100);
  noStroke();
}

void draw()
{
  if (frameCount > 200) return;
  
  fill(255);
  
  for (int i = frameCount * 10; i < (frameCount + 1) * 10; i++)
  {
    ellipse(random(box_size), random(box_size), 4, 4);
    ellipse(Halton(i, 2) * box_size + box_size + 16, Halton(i, 3) * box_size, 4, 4);
  }
  
  fill(0);
  rect(box_size, 0, 16, box_size);
  rect(0, box_size, width, 20);
  
  fill(255);
  textSize(14);
  text("random()", 2, height - 5);
  text("Halton Sequence", box_size + 16 + 2, height - 5);
  
//  saveFrame();
}