Using the Rounded Rectangle Tool (U) (radius 40px), try to get the primary elements reserved for the ornament to be.

The layer’s parameters: Fill 0%
Blending Options>Stroke

 

Make three copies of the last represented layer and select Free Transform option to turn over the copies if necessary and place them the way indicated below:

Combine in a group all the layers, containing the primary elements of the ornament (press Ctrl to mark out the corresponding layers and hold on the left mouse’s button when taking the marked layers on Create a new group selection). Put together the elements of the group to get a single layer. Press on the group the next combination of buttons CTRL+E. Select for the last layer the next option: Filter>Distort>Twirl

Choose the Free Transform option to place the ornament on the central part of the picture and make it smaller a little.

Make a mouse click on the same layer on the lowest part of the layers’ palette on Add a Mask selection and choose the Brush Tool (B) of black color to clean out the unnecessary parts of the ornament.

The layer’s parameters: Fill 30%
Blending mode-Overlay