ANSWER = 41803

fn t(s) {
  return (ANSWER * s + 12345) % 214748
}

xs = 205804
ys = 71816
ox = 35 - (t(xs) % 70)
oy = 35 - (t(ys) % 70)
r = startSketchOn('XZ')
  |> startProfileAt([ox, oy], %)
  |> line(end = [1, 0])
  |> line(end = [0, -1])
  |> line(end = [-1, 0])
  |> close(%)
  |> extrude(length = 1)