"sectionNotes": [ [0, 0, "4", 0], [0, 1, "4", 0], [250, 2, "8", 0], [500, 3, "4", 0] ]

Since its release in 2020, Friday Night Funkin' (Newgrounds, 2020) has distinguished itself not only through its aesthetic and narrative but through its radical moddability. The term "remix script" has emerged colloquially to describe any modification that re-sequences, re-pitches, or re-contextualizes an existing FNF track. Unlike a total conversion mod, a remix script typically operates within the original game’s asset boundaries (characters, UI, base engine), focusing instead on altering the song’s beatmap, tempo, or melodic structure. This paper answers the question: What, technically and creatively, constitutes a "basic FNF remix script"?

A complete FNF remix script is not a single file but a set of coordinated modifications. We break it down into three layers:

The core mechanic of FNF is a scrolling note highway. The remix script must include a new chart file (e.g., songs/[songName]/[difficulty].json ). A basic chart structure includes: