Greek key tapestry pattern

Greek keys (also known as meanders or Greek frets) are traditional borders with a long history. It is a little tricky to get the border to turn a corner, as the basic unit is not square. Below is one possible solution. There are several patterns nested inside each other. You can use the whole pattern, or extract the particular border that you like. You can change the colours as well, of course.

To print a pattern (on Windows), position the mouse on it and click the right button, then click on Save Picture or Print Picture.