let y = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(255);

}

​

function draw() {

  let rw = width/4;

  rect(x, y, rw, height);

  rect(rw, y, rw, height);

  rect(rw*2, y, rw, height);

  rect(rw*3, y, rw, height);

}