class Walker {
    constructor(x = 0, y = 0) {
        this.tx = 0
        this.ty = 10000
        this.x = x
        this.y = y
    }

    step() {
        let dx = map(noise(this.tx), 0, 1, -1, 1)
        let dy = map(noise(this.ty), 0, 1, -1, 1)

        this.x += dx
        this.y += dy

        this.tx += 0.01
        this.ty += 0.01
    }

    draw() {
        stroke(0)
        point(this.x, this.y)
    }
}

let walker

function setup() {
    createCanvas(640, 240)
    background(255)
    walker = new Walker(320, 120)
}

function draw() {
    walker.step();
    walker.draw();
}