Make a binary system 2d in p5.js

function setup() {
  createCanvas(400, 400);
}

function draw() {
  background(220);
  
  rect(10, 10, 100, 100);
  rect(200, 10, 100, 100);
  
  rect(10, 200, 100, 100);
  rect(200, 200, 100, 100);
}