How Do I Skip an Element?

I'm looking to play a long (circle) chord progression and I want steps in the progression to randomly drop out, but instead of silence I want the pattern to skip to the next element.

The ? lets elements drop out, but doesn't skip to the next one without silence.

There's a bunch of unshown variables, but here's the context:

prog = "<^one ^four ^seven ^three ^six ^two ^five>"

progRand = "<^one? ^four? ^seven? ^three? ^six? ^two? ^five?>"

p "chords" $ slow 2
  $ note (scale colorMain progRand)
  # s synth
  |+ note (fromInteger(key)) 
  # octave 3
  # legato 1
  # gain 0.75

I'm guessing what I want doesn't jibe well with how Tidal works and isn't (easily) possible. But figured I'd still ask.

Thanks!