It is very easy to create a background for macro subjects - especially when shooting them indoors. This particular background is a small piece of lightly-patterned card stock (craft paper) available at most craft stores (such as Michaels). Use the interior designer in you to select image backgrounds that match the decor of the room or other background the picture will ultimately be displayed in.
Lighting for this shot came from a cloudy sky through a bathroom skylight.
Camera and Lens Settings
100mm f/16.0 4s
5616 x 3744px