A spiral in the magic square

After experimenting a bit I managed to make a spiral in de centre of the magic square.

First I made a 16x16 square with the smallest numbers (1-16) in the centre.

Then I found a way to manipulate the order of this numbers.

And from this a got this idee of making a spiral where numbers are places from 1 till 16.

However a spiral of only 16 numbers is not so interesting, so I tryed with the numbers 1-64 in a 32x32 square.

And see here the result.

The square is magic at its rows, column an head-diagonals.