constructor() {

    this.x = width / 2;

    this.y = height / 2;

  }

​

  show() {

    stroke(0);

    point(this.x, this.y);

  }

​

  step() {

    let r = random(1);

​

    let xStepSize = randomGaussian();

    let yStepSize = randomGaussian();

​

    if (r < 0.25) {

      this.x = this.x + xStepSize;

    } else if (r < 0.5) {

      this.x = this.x - xStepSize;

    } else if (r < 0.75) {

      this.y = this.y + yStepSize;

    } else {

      this.y = this.y - yStepSize;

    }

  }

}

​

let walker;

​

function setup() {

createCanvas(windowWidth, windowHeight);  

  walker = new Walker();

  background(255);

}

​

function draw() {

  walker.step();

  walker.show();

}

​