Working with Patterns
Since version 1.3.4 (?), Scribus contains a new type of filling objects: patterns. This means, that you can define any Scribus object - or group of objects - as a pattern and use it as filling for other objects.
For example, download a SVG clipart from openclipart.org and import it into Scribus via "File / Import Get Vector File". Right click on the drawing and use "Send to Patterns". Scribus will ask you for an name for the new pattern: