createCanvas(400, 400);

    w = new walker();

    w.x = 0;

    w.y = 0;

    background(220);

} 

​

function draw() { 

  w.step;

  w.display;

}

​

walker = function() {

    /*

    var setup = function(x,y) { 

        this.x = x;

        this.y = y;

    }

    */

    var step = function() {

        var choice = randInt(0,3);

        if (choice == 0) {

            this.x++;

        }

        else if (choice == 1) {

            this.x--;

        }

        else if (choice == 2) {

            this.y++;

        }

        else {

            this.y--;

        }

        print('choice=' + choice);

    }

    var display = function() {

        ellipse(this.x,this.y,2,2);

    }

}

​

//note it didn't ever equal max, so we add +1 later on

function randInt(min, max) {

    min = Math.ceil(min);

    max = Math.floor(max + 1);

    return Math.floor(Math.random() * (max - min)) + min;

}