Once the challenge starts why not make a series of random notes, either using a seven note scale or a twelve note scale, or something else, pentatonic maybe?
Then use that as your starting point for something in a song. Tag your stuff #randomnotes
Sounds like a job for The Musician’s Dice.
Cool, I'd like to try
I'm definitely up for this one.
I might try this.
I stumbled upon this random motif generator a few FAWMS ago! Check it out https://forrestweiswolf.github.io/random-motifs/