Creation new arrays in for loop command - randomizer

Dears,

Currently I am working on some kind of randomizer where I generate white and black balls. In the first step I generate them on the graph as a horizontal "curve". In next step I generated similar "random curve", however, it is vertical curve and it starts only when in horizontal curve black ball appears:

Variable1 = 60;
Variable2 = 30;

% Arrays for the backbone
A = zeros(Variable1,2); %triol
B = zeros(Variable1,2); %dicarboxyacid

% Horizintal randomizer
for i=1:Variable1
    if  randi(100,1,1)<=Variable2
        A(i,2)=1;
        A(i,1)=i;
    else
        B(i,1)=i;
        B(i,2)=1;
    end
end

% Deletes all zeros in A
TestForZero = A(:,1) == 0;
A(TestForZero, :) = [];

% Vertical randomizer
for q = 1:height(A)
   if  randi(100,1,1) <= Variable2
       C1(q,2) = q+1;
       C1(q,1) = A(1,1);
   else
       C2(q,2) = q+1;
       C2(q,1) = A(1,1);
   end
end

for q = 1:height(A)
   if  randi(100,1,1) <= Variable2
       D1(q,2) = q+1;
       D1(q,1) = A(2,1);
   else
       D2(q,2) = q+1;
       D2(q,1) = A(2,1);
   end
end
% Visualization of the randomizer
figure(1)
hold on
plot(A(:,1),A(:,2),'o','MarkerFaceColor',"black",'MarkerEdgeColor',"black",'MarkerSize',10)
plot(B(:,1),B(:,2),'o','MarkerFaceColor',"white",'MarkerEdgeColor',"black",'MarkerSize',10)
plot(C1(:,1),C1(:,2:end),'o','MarkerFaceColor',"black",'MarkerEdgeColor',"black",'MarkerSize',10)
plot(C2(:,1),C2(:,2:end),'o','MarkerFaceColor',"white",'MarkerEdgeColor',"black",'MarkerSize',10)
plot(D1(:,1),D1(:,2:end),'o','MarkerFaceColor',"black",'MarkerEdgeColor',"black",'MarkerSize',10)
plot(D2(:,1),D2(:,2:end),'o','MarkerFaceColor',"white",'MarkerEdgeColor',"black",'MarkerSize',10)
axis off
hold off

As you can see, I managed to make vertical curves for more than one black ball in the horizontal curve. Nevertheless, I did it "manually". Is it possible to make it in some for loop?

The problem is I do not know how many of black balls will be created for each run. Moreover, in theory its amount is infinity, because by increasing Variable1 and Variable2 I increase the amount of black balls in the curves (in horizontal as well as vertical curves).

I thought about creating new arrays for each itteration, however, I found information that it is not preffered way and it can be done in other ways. Could you please help me with that?

Thank you in advance,

Cheers

[Stephen23]

"Could you please help me with that?"

https://www.mathworks.com/help/matlab/cell-arrays.html

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-cell-array.html

[Wojciech]

Thank you!! :) Now it is more clear and I found the solution. Cheers!