Black Background

[Alex Miranda]

Hello, i've created two windows to view my scene. I would like to turn black the main window and show the two windows. My code is:

import viz

viz.go(viz.FULLSCREEN)
maze = viz.addChild('maze.osgb')

upLeftWindow = viz.addWindow()
upLeftWindowView = viz.addView()
upLeftWindow.setView(upLeftWindowView)
upLeftWindow.setPosition([0.566,0.91])
upLeftWindow.setSize(0.405, 1)

upLeftWindowViewLink = viz.link( viz.MainView, upLeftWindowView )
upLeftWindowViewLink.preEuler([0, 0, 0])
upLeftWindowViewLink.postTrans([0, 0, 0])

upRightWindow = viz.addWindow()
upRightWindowView = viz.addView()
upRightWindow.setView(upRightWindowView)
upRightWindow.setPosition([0.032,0.993])
upRightWindow.setSize(0.436,0.93)

upRightWindowviewLink = viz.link( viz.MainView, upRightWindowView )
upRightWindowviewLink.preEuler([0, 0, 0])
upRightWindowviewLink.postTrans([0, 0, 0])

thks.