Description
According to the legend, there was once a huge flood in ancient China, while a turtle emerged from the sea with a curious pattern on its shell: a 3×3 grid in which circular dots of numbers were arranged, such that the sum of the numbers in each row, column and diagonal was the same: 15. This square, called "Lo Shu Square" is fundamental in feng shui and Taoist tradition. Thereafter people were able to use this pattern in a certain way to control the river and other natural energies.