module prism(l, w, h) {
    polyhedron(
    points = [[0, 0, 0], [l, 0, 0], [l, w, 0], [0, w, 0], [0, w, h], [l, w, h]],
    faces = [[0, 1, 2, 3], [5, 4, 3, 2], [0, 4, 5, 1], [0, 3, 4], [5, 2, 1]]
    );
}