The modeler is free to be as creative as he or she wants when it comes to the makeup of each module. A module can be very short (2 feet) or very long (100 feet). It can be straight or curved. It can be comprised of one section or many.
If the reader is interested in learning more about Free-mo, the official standards are found at Free-mo.org.
Here is a photograph of the August 2018 Free-mo setup at Big Valley, Alberta. This annual event is hosted by the Calgary Free-mo group Calgary Free-mo. The goal was to set a north American record in 2018 as it was the 15th annual Big Valley Free-mo event. This goal was easily met with 1,126 feet of modules.