How to log current slice

I'm thinking about "djing" with tidal.
With a pattern like this one:

  let l = 16
  let st = "t!16"
  let sl = "0..15"
    $ loopAt 4
    $ struct st
    $ slice l sl
    $ sound "party-music:0" # legato 1

I'd like to print to the console the slice which is currently playing, so I understand when it's time to evaluate a new block of code.
Something like d1: 1/16, d1: 2/16 would be enough.
Do you know how to achieve it?
I've tried with every and print but it doesn't work.
Thank you!