Wake random for different pictures

Watchface Design Expression Help
1

So I’ve a picture which is large. I split it to 9 different images. Now I want Facer to randomly show the 9 pictures.

I tried few things but didn’t get this to work…

here are some that I tried for opacity:
$wakeRand(0, 100)<10?100:0$
$wakeRand(0, 100)<20?100:0$
…
$wakeRand(0, 100)<90?100:0$

also tried $(wakeRand(0, 100))<10?100:0$ and ($(wakeRand(0, 100))<10?100:0)$

Any help or ideas?