Draw a x-by-x matrix 'F' using 1 and 0. (x is odd and bigger than 4)
Example:
x=5 ans= [1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 0 0 0 0 1 0 0 0 0] x=7 ans= [1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0]
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