The epicycloid, a curve created by a point on a circle rotating about a circle, has n cusps, where n is the ratio of the diameter of the traveling circle to the fixed one. It can also be created by beginning with the diameter of a circle and offsetting one end by an arbitrary number of steps of equal arc lengths along the circumference, while at the same time offsetting the other end along the circumference by steps n+ 1 times as large. After traveling around the circle once, the envelope of an n-cusped epicycloid is produced. This one has 12 cusps and 150 points around the outside circle. The 'wires' are circular in cross section.