I have an application using frames. Each page in each frame has a green background.
After entering data (or anything alike) often the top-page is loaded again, which loads the first sub-frame. When the first sub-frame is loaded (using the construction it triggers loading of the next sub-frame. This way, data can be passed easily from sub-frame to sub-frame.
So most of the frames have no src="..." attribute.
But, while this happens, the background of the not-yet loaded frames is white.
It all works quite fast, but still most of the times the user sees a short flash of white in between the green screens.