The method shown here can be applied to magic squares of any size, provided they have an odd number of horizontal and vertical rows. So let's write the number first 1 in the middle of the top row. Now we go diagonally to the top right with the pencil and are thus outside the square. So we go down the next row to the last square and write the number 2 in. Now let's take another step diagonally up and to the right, we're out of the square again. {With the five-square we would have a field here, to write the 3 in.) So we go the row to the left to the last field and set the number 3 in.
We have now written the first set of numbers. A set of numbers is equal to the number of longitudinal- or cross rows, in this case 3. To line up the next sentence, let's go down one square and write the first number of the second sentence, 4. (The first number of the next sentence is always below the last number of the previous sentence.) We now repeat the same procedure as in the first movement: one field diagonally to the top right, 5, and further diagonally to the top right, 6. This completes the second sentence. We go from the 6 down another field, write 7 in and complete the square in the same way as before.
How to make a magic square, The fields for the first "Sentence” Numbers are red, gray for the second set and white for the third set.