Based on this Gothic tracery pattern we have also drawn a 3D model that you can download here: 3D models of gothic window tracery
You can use the pattern for Gothic-related projects, and if you take a closer look, this pattern is essentially a simple square border with a large blank space in the middle where you can insert something.
By the way, such patterns are very simple to draw, you just need basic knowledge of planar geometry, i.e., knowledge of drawing various 2D figures using geometric drawing methods. If you, however, lack in this knowledge, you can find a large number of old books that address this issue, or simply draw Gothic tracery in 2D CAD software.
