How to concatenate multi rows in matrix ?

How to concatenate multi rows in matrix, for example I've a matrix 6X8

x=  1 1 1 1 1 1 1 1 
    2 2 2 2 2 2 2 2
    3 3 3 3 3 3 3 3
    4 4 4 4 4 4 4 4
    5 5 5 5 5 5 5 5
    6 6 6 6 6 6 6 6

the result like this

y =  1 1 1 1 1 1 1 1 
     2 2 2 2 2 2 2 2
     3 3 3 3 3 3 3 3
     4 4 4 4 4 4 4 4

y =  1 1 1 1 1 1 1 1 
     2 2 2 2 2 2 2 2
     5 5 5 5 5 5 5 5
     6 6 6 6 6 6 6 6

y =  3 3 3 3 3 3 3 3
     4 4 4 4 4 4 4 4
     5 5 5 5 5 5 5 5
     6 6 6 6 6 6 6 6

tried concatenated row_row by this code below :

old=round(10*rand(6,8)) 
for n=1  :size(old)
for m=n+1:size(old)
newline  = [old(n, :); old(m, :)]

end
end

Answer 1

[Andrei Bobrov]

y = 1:6;
o = reshape(bsxfun(@times,kron(fliplr(~eye(3)),[1 1]),y)',1,[]);
out = repmat(reshape(o(o~=0),4,1,[]),1,7);

ADD

old = randi(40,6,8)

t = kron(fliplr(~eye(3)),[1 1])'>0
for jj = size(t,2):-1:1
    out(:,:,jj) = old(t(:,jj),:);
end

[hewaa mero]

thanks for your correct answer, but how I can use each part of out matrix separately ?

[hewaa mero]

i tried but by using for loop but it doesn't accept

[Andrei Bobrov]

see ADD part

[hewaa mero]

you mean I just use add part, and I used this part but answer not correct there 3 there matrix: out(:,:,1),out(:,:,2)again out(:,:,1), and out matrix is not ordered like that 1st part with 2nd part ,1st part with 3rd, 1st part with 4th,.....