let walker;

function setup() {
    createCanvas(400, 400);
    background(255);
    strokeWeight(2);
    stroke("rgba(0,0,0,0.4)");
    walker = new Walker(200, 200);
}

function draw() {
    for (let i = 0; i < 10; i++) {
        walker.move();
        walker.show();
    }
}

class Walker {
    constructor(x, y) {
        this.pos = createVector(x, y);
        this.count = 0;
    }
    move() {
        let step = p5.Vector.random2D().mult(2);
        this.pos.add(step);
        if (this.count++ > 10000) {
            this.pos = createVector(200, 200);
            background(255);
            this.count = 0;
        }
    }
    show() {
        point(this.pos.x, this.pos.y);
    }
}