Did you happen to have no inspiration and not be able to make anything?
Well, in these cases, we would do well a little push.
There are, looking on google, many freeware software that allow you to generate random riffs in MIDI format, useful in these cases.
Who knows, maybe our inspiration can come back to the surface, and a few random note something good could come out!
I simply suggest a site where you can do all this and more, and then, send you an email with the MIDI file created.
Very simple and intuitive!
If you search on google:
“random riff generator software”
you can find many other software…
Or if you have accidentally FL STUDIO, in the PIANO ROLL in the menu there is an entry that says RIFF MACHINE.
With that you can create random riffs, studied, according to the notethe scale, length, and much more.