for nshift = 0:5:10,

[x1,n] = stepseq(-5+nshift,-50,50);
[x2,n] = stepseq(-5+nshift+11,-50,50);
x = x1-x2;
w = -2*pi:pi/100:2*pi;

ndisp = (-50:50);
dtft_disp3

pause
end
