Group tournament simulation with matlab

I am trying to develop a script for world cup alike tournament simulation. I've already finished script for play-off stage and now I have problems finding a solution how to write script for a group stage.

There are 4 teams (A,B,C,D) in a group. Each team will play one time against another (6 matches in total). The score of the team is generated randomly by using this code: A = [32:44]; a1 = numel(A); A1=A(ceil(rand*a1));

 B = [30:47];
b1 = numel(B);
B1=B(ceil(rand*b1));

and so on. winner is decided:

if A1>=B1;    (for the rest games: A2>=C1, A3>=D3, B2>=C2, B3>=D2, C3>=D3)
AW1=1;
BW1=0;
else
AW1=0;
BW1=1;
end

Finally, I will get number of victories for each team: AW=AW1+AW2+AW3; BW=BW1+BW2+BW3; CW=CW1+... and so on.

After all games are simulated, any ideas how can I arrange them into a standings ? There can be 4 possible outcomes of the Wins and Losses: [3 2 1 0], [3 1 1 1], [2 2 1 1] and [2 2 2 0]. Tie breaker is important (if there are 3 teams with a same number of victories, they can not be arranged in the final standings randomly). The point difference is defined as a variable. For example:

        W  L  differance
1. A    3  0   20
2. B    1  2   5
3. C    1  2  -2  
4. D    1  2  -10

Any ideas how to do it ? I am stuck on it for days. I think this is possible to do by manipulating if statements, but so far it looks that would be a very long script !