I want to play a video of some topic .The player contain audio,text,video files.for example if i will play some topic about newton's law ,in that topic play as video,audio,text.while playing video ,in certain interval i want to popup questions randomly based on that topic.can any one help me.how to popup questions randomly while playing video.can u give any project link like this type of project or provide this type of demo project.i have no idea how to popup questions while playing topic in player.