DFT circular shifting property

    n=0:10
x=10*(0.8).^n
stem(n, x) ; grid;
title('Original Sequence')
xlabel('n') ;

Dear all, i would like to create a code that can produce the output as shown above. However i am unable to create n=15 when i use 'stem(15, x) ' error came out Error using stem (line 31) X must be same length as Y.

Error in Untitled (line 3) stem(15, x) ; grid;

please assist