fn box = (p, h, l, w) => {
 const myBox = startSketchOn('XY')
    |> startProfileAt(p, %)
    |> line(end = [0, l])
    |> line(end = [w, 0])
    |> line(end = [0, -l])
    |> close()
    |> extrude(length = h)

  return myBox
}

const thing = box([0,0], 3, 6, 10)
