This video is from Valentina Moseychuk.
Set up 6-10 cones in two lateral rows (sideline to sideline) about 5 feet apart. Players move around cones, always facing net, with small, quick steps. As soon as one player moves to 2nd cone, next player begins so that eventually you will have a chain of players moving through the series of cones. Check out the video to see how it looks in action. This drill is at the beginning of the video.