Update tutorial demo
Update tutorial demo

xuanyi0627/Presentation,haaakon/Presentation,luzefeng/Presentation,ernestopino/Presentation,flooie/Presentation,haaakon/Presentation,tonypham/Presentation,tonypham/Presentation,xuanyi0627/Presentation,luzefeng/Presentation,flooie/Presentation,ernestopino/Presentation