How do i make qpsk constelation

Hi i want to make something like this from my qpsk please how do i do it

[SHIVAM KUMAR]

%%Use scatter to plot that table.

scatter(points);

%%If you want to make constellation points simply make array like

k=1;

%k=double(1.0)/double(sqrt(2)); %The normalizing factor You don't need it here

constellation=k*[1+1i -1+1i 1-1i -1-1i];

[Kamil Kacer]

i gives me an error i cannot plot the whole table