how to plot the FFT of a list of values

[Boris Dorestand]

I have 16 values of the period sequence 1, 2, 4, 8, 1, 2, 4, 8, ...  I
compute its fourier transform using

>>> from scipy import fft, ifft
>>> x = [1,2,4,8,1,2,4,8]
>>> fft(x)
array([ 30. +0.j,   0. +0.j,  -6.+12.j,   0. +0.j, -10. +0.j,   0. +0.j,
        -6.-12.j,   0. +0.j])

Now how can I plot these values?  I would like to plot 16 values.  What
do I need to do here?  Can you show an example?