How to control music in your computer using hand gestures

Earlier I posted how to control music in android using hand gestures, but in this tutorial I'll tell you How to control music in your computer using hand gestures. This trick is very useful if you are a lazy person and don't want to go near your computer to play/pause or change the music track. Using this trick, you can amaze your friends also and can prove that you are a smart guy... haha.