As you can see in the picture, our Art Nouveau frame design here consists of one floral design arranged in each corner of the rectangular surface. The design is simple and consists of a twig with leaves and red fruits. The term "Art Nouveau" is contained in the name of this design because it was found in a book that had a lot of Art Nouveau-style designs, this one included.
Otherwise, designs of different shapes from this floral design can be obtained in 2D CAD or vector software, just by using simple commands such as Copy, Mirror, Array, Rotate... If you have the time, try to create them, you may be pleased with the results!
Within the 2D CAD file there is only the outline of design, and within the vector files there are colour variants, as well as the outline, so that you may paint them to your liking.