My Matlab code is not plotting. Could you please tell me what is wrong?

the code:

$\%$ defyining the signal attributes

x $=1+$cos$(0\mathrm{.}5*$pi$*$n$)$;

n $=0$:$127$;

$\%$ ftt calculation

X $=$ fft$($x$,128)$;

W $=$ linspace$(0,2*$pi$,128)\text{'}$;

L $=$ length$($X$)$;

$\%$ plotting the signal

figure;

plot$($W$,$ abs$($X$)/$L$,$ 'LineWidth',$2)$;

title$(\text{'}$FFT $-$ Range $0$ to $2$PI$\text{'})$;

xlabel$(\text{'}$W $->0$ to $2*$pi$\text{'})$;

ylabel$(\text{'}$Magnetude$\text{'})$;

X$\_$shift $=$ fftshift$($X$)/$L;

W$\_$pi$2$pi $=$ linspace$(-$pi$,$ pi$,128)$;

figure;

plot$($W$\_$pi$2$pi$,$ abs$($X$\_$shift$),$ 'LineWidth',$2)$;

title$(\text{'}$FFT $-$ Shift in the Range of $-$pi to pi$\text{'})$;

xlabel$(\text{'}$W $->-$pi to pi$\text{'})$;

ylabel$(\text{'}$Magnetude$\text{'})$;

Ts $=1$e$-4$;

fs $=1/$Ts;

f $=$ linspace$(-$fs$/2,$ fs$/2,128)$;

figure;

plot$($f$/1000,$ abs$($X$\_$shift$),$ 'LineWidth',$2)$;

title$(\text{'}$FFT in the Range of $-$fs$/2$ to fs$/2\text{'})$;

xlabel$(\text{'}$W $->-$fs$/2$ to fs$/2$ in kHz$\text{'})$;

ylabel$(\text{'}$Magnetude$\text{'})$;