Does anyone know how to have a random knot come up in Ink?

Sorry if this is the wrong place to ask.

I'm wanting to program a simple Oregon Trail type of game in Ink. But I can't find a simple way to have a central hub from which to select random events (knots).

The central gameplay loop is a knot that displays variables as you go (the camp/wagon, I guess). Then the player would select from random things to do and would have to make choices in those knots. Then they come back.

The issue I'm having is that I can't find a simple way to have random knots presented to the player.

I came across this code on a GetHub thread, but I can't make it work:

{
- RANDOM (1, 3): -> a
- RANDOM(1,2): -> b
- else: -> c
}

I'm not a programmer, so I can't do much :P.

Any help would be greatly appreciated. Particularly if there is a way to make images come up randomly too. That would be amazing. I know Ink was not designed with images in mind, but that would be swell.