problem with naming of variables

[jj mahoney]

Hi, How do I name this variable correctly, @{bet$random_bet_position);
With regards to the script below, @selected_bet is suppose to select either 
@bet1, @bet2 or @bet3 depending on the chosen number held by 
$random_bet_position, so how do I do this? Thanks
 
@bet1 = (0,0,0,0);
@bet2 = (0,0,0,1);
@bet3 = (0,0,1,0);
 
$random_bet_position = int(rand(3) + 1);
 
@selected_bet = @{bet$random_bet_position);