[Before proceeding to this article, please make sure that you accustomed with Background Stripes]
Open the row editing interface of Visual composer and scroll it all the way down. There you will see the “Enable parallax” checkbox (see fig. 1.). After checking it, additional “Parallax speed” input will be revealed. “1″ value equals normal scrolling speed (parallax effect will not be noticeable). For best result keep this value in range from 0.3 to 0.7.
Also note that negative values are acceptable, this will make your background move in reverse direction.