The document discusses the development of an original humorous rap song called "The Royal Rap" created by the authors for their extended project. They initially considered covering other comedic artists but decided an original song would give them more freedom. One author wrote the lyrics while the other created the soundtrack using various music programs. They looked to other parody songs for inspiration on style. After multiple iterations refining both the lyrics and soundtrack, they finalized the song and were pleased with the humorous musical piece they created combining their talents.