constructor() {

    this.x = width / 2;

    this.y = height / 2;

  }

​

  show() {

    stroke(0);

    point(this.x, this.y);

  }

​

  step() {

    let xstep = floor(random(3)) - 1;

    let ystep = floor(random(3)) - 1;

​

    this.x += xstep;

    this.y += ystep;

  }

}

​

let walker;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  walker = new Walker();

  background(255);

}

​

function draw() {

  walker.step();

  walker.show();

}

​