width = 5
height = 10
length = 12

fn box(sk1, sk2, scale) {
  boxSketch = startSketchOn(XY)
    |> startProfile(at = [sk1, sk2])
    |> line(end = [0, scale])
    |> line(end = [scale, 0])
    |> line(end = [0, -scale])
    |> close()
    |> extrude(length = scale)
  return boxSketch
}

box(0, 0, 5)
box(10, 23, 8)
thing = box(-12, -15, 10)
box(-20, -5, 10)