Nim game

You are encouraged to solve this task according to the task description, using any language you may know.
Nim is a simple game where the second player ─── if they know the trick ─── will always win.



The game has only 3 rules:

   start with   12   tokens
   each player takes   1,  2,  or  3   tokens in turn
  the player who takes the last token wins.


To win every time,   the second player simply takes 4 minus the number the first player took.   So if the first player takes 1,   the second takes 3 ─── if the first player takes 2,   the second should take 2 ─── and if the first player takes 3,   the second player will take 1.



Task

Design a simple Nim game where the human player goes first, and the computer always wins. The game should enforce the rules.




total: 12
while ø [
    tk: 0 
    print "YOUR turn:"
    while [not? contains? 1..3 tk: <= to :integer input "How many tokens will you take? (1-3) "][]
    total: total-tk
    print [total "tokens remaining\n"]
 
    print ["COMPUTER's turn:"]
    print ["taking:" 4-tk]
    total: total-(4-tk)
    print [total "tokens remaining\n"]
    if total=0 [
        print "COMPUTER won. :)"
        break
    ]
]