var counter = 0;

​

function setup() {

  createCanvas(400, 400);

  x = width/2;

  y = height/2;

  noStroke();

  background(0);

}

​

function draw() {

  //update

  x += noise(50, counter) - 0.5;

  y += noise(0, counter) - 0.5;

  counter += 0.01;

  //draw

  // background(0, 4);

  ellipse(x, y, 1);

}