The repeat property sets how a background image will be repeated. In the absence of
repeat attribute 'no-repeat' will be considered as default. Supported values no-repeat, repeat-x, repeat-y and repeat.
The value repeat-x repeats an image horizontally, repeat-y repeats an image vertically, and repeat
repeats an image both horizontally and vertically. The last image will be clipped if it does not fit.
The default background color will be black which can be overridden by the 'imgbackgroundcolor' attribute.