Help Simulating a 3-Card Tarot Reading

Hi All,

I need some help with a variable.  I am trying to simulate a 3-card Tarot reading of the 22 Major Arcana cards.  I have set up a demo and attached it:

• It has 3 random number variables that start at "zero" and then are triggered by a drag/drop to make state changes on my  Tarot cards.
• I have 3 piles of  Tarot cards: 1-7, 8-14, and 15-22  (luckily these Tarot cards a numbered so checking the state changes and variables are easy).
• You reveal cards by dragging a card into the past, present and future drop zones.

I can't get my head around how to construct a variable that would simulate a deck of 22 cards shuffled randomly for the first choice, 21 cards for the second choice, and 20 cards for the third choice--and not repeat cards.

My current set up would work fine since the user wouldn't be able to see behind the curtain, but I want to figure this out for myself.  I played around with different conditions on the 3 variables but I couldn't figure out how to make them truly random while suppressing the cards that are already revealed.

Thanks and I hope I posted this in the correct place.