private static CTBackground createBackground(String rId) {
org.docx4j.wml.ObjectFactory wmlObjectFactory = new org.docx4j.wml.ObjectFactory();
CTBackground background = wmlObjectFactory.createCTBackground();
background.setColor("FFFFFF");
org.docx4j.vml.ObjectFactory vmlObjectFactory = new org.docx4j.vml.ObjectFactory();
// Create object for background (wrapped in JAXBElement)
org.docx4j.vml.CTBackground background2 = vmlObjectFactory
.createCTBackground();
JAXBElement<org.docx4j.vml.CTBackground> backgroundWrapped = vmlObjectFactory
.createBackground(background2);
background.getAnyAndAny().add(backgroundWrapped);
background2.setTargetscreensize("1024,768");
background2.setVmlId("_x0000_s1025");
background2.setBwmode(org.docx4j.vml.officedrawing.STBWMode.WHITE);
// Create object for fill
CTFill fill = vmlObjectFactory.createCTFill();