Torus Knots

D Moews sent me a program that calculates torus knots. The program prompts for input parameters and outputs torus knots as stl files. The program was used to make four knots, one of which is the simplest knot, the trefoil. See https://en.wikipedia.org/wiki/Torus_knot The fortran souce code and the input parameters for the construction of the knots are included.