// Solution by Rick Sidwell

// http://natureofcode.com

​

let walker;

​

function setup() {

  createCanvas(640, 240);

  walker = new Walker();

  background(255);

}

​

function draw() {

  walker.step();

  walker.show();

}

​

class Walker {

  constructor() {

    this.x = width / 2;

    this.y = height / 2;

  }

​

  show() {

    stroke(0);

    point(this.x, this.y);

  }

​

  // Give the walker a greater tendency to move down and left by making

  // the random range larger in that direction

  step() {

    let xstep = random(-2.75, 3);

    let ystep = random(-2.75, 3);

    this.x += xstep;

    this.y += ystep;

  }

}

​