Features to develop :
- After the user starts scrolling the page, open a lightbox who look like that when user is at the middle of the page
- Load this awesome youtube video inside the lightbox
- Play automatically the youtube video on the lightbox opening
- Close automatically the lightbox at the end of the video
- (A plus) Show the lightbox only during 2nd, 5th and 7th time, user is coming on the page
- (A plus) Use pure javascript (without jQuery or any libraries) to code theses features