I wish to repeat a sequence a certain amount of time?

%Input signal-------------------------
numBits = input('Enter number of bits: ');    %User inputs data

byte = randi([0,1],1,numBits);                %Randomizing between 0 and 1 
ln = length(byte);                            %Length of the bit array
de = bi2de(byte,'left-msb');                  %Convert Binary to Decimal
%-------------------------------------

%Converting bit 0 to +1
for i=1:ln
  if byte(i)== 0                            %In the array wherever a '0' appears
      byte(i) = -1;                         %Will change from '0' to '-1'
  end                                       %End of 'If' statement
end                                           %End of 'For' loop
%-------------------------------------

%Plotting the Input Signal
subplot (6,1,1);                                            
stairs (byte,'linewidth',2); axis([0 ln -1.25 1.25]);
title ('Input Signal')
grid on

%8-bit Sequence------------------------
k=1;
for i=1:ln
  for j=1:8
      b(k) = byte(i);
      j = j +1;
      k = k +1;
  end
end

ln1 = length(b);
subplot(6,1,2);
stairs (b,'linewidth',2);axis ([0 ln1 -1.5 1.5]);
title ('8-Bit Sequnce')
grid on
%--------------------------------------------------

This program will generate a random sequence of 1 and -1, however I wish to repeat the 8-bit sequence a certain amount of times. Can anyone help me with the additional code.