Magic squares of doubled order:   n=4k+2

There are some wellknown methods to create a magic square of doubled size n=4k+2 from an existing magic square of odd order.

LUX-Method (Conway)
Rothstein (Variant )
Zhan – Wang – Huang
Zheng – Lin – Chen
Unknown author (Method 1)
Unknown author (Method 2)

All algorithms are described in detail in chapter Magic Squares of doubled order (german: Verdopplung der Ordnung) together with some other PDF documents.