var INVERSE_SPEED = 1000;
var previousTime;


function setup() {
  createCanvas(500, 850);
  background(random(255), random(255), random(255));
  noStroke();
}

function draw() {
  currentTime = floor(millis() / INVERSE_SPEED);

  if (previousTime != currentTime) {
    fill(random(255), random(255), random(255));
    rect(55, 280, 395, 500);

    fill(random(255), random(255), random(255));
    rect(55, 60, 395, 175);

    filter(BLUR, 6);

    previousTime = currentTime;
  }
}