​

class Walker {

    constructor(){

    this.x=width/2;

    this.y=height/2;

  }

  display(){

    stroke(0);

    point(this.x, this.y);

  }

    step(){

     let direction = float(random(3));

    if(direction < 0.5){

      this.x--;

    } else if (direction > 0.5 && direction < 1){

        this.y--;

    } else if( direction > 1 && direction < 2){

        this.x++;

    } else {

        this.y++;   

    }

  }

}

​

function setup() {

  createCanvas(400, 400);

  background(220);

  walker = new Walker();

}

​

function draw() {

  walker.step();

  walker.display();

}