torus
// torus {MAJOR, MINOR} // (in the X-Z plane)
// MAJOR = float value giving the major radius
// MINOR = float specifying the minor radius
// The major radius extends from the center of the hole
// to the mid-line of the rim while the minor radius
// is the radius of the cross-section of the rim.
torus {
0.8,
0.2
}