I didn’t understood anything about jQuery playground. I’ve completed the tasks on the end of bootstraps one. I had headache seeing left-wall and right-wall. Someone please seriously explain me about that!
First of all it was well and not wall secondly it is really a simple one but a bit different, you need to specify which part you didn’t understand as jQuery is mainly for adding effects. As it is already explained in the tutorial it uses few libraries (which were already added) to bring those effects. 