In 13 mins - http://jsfiddle.net/jtR9E/ Found this task pretty interesting, of course i used random, cause that's a normal think i guess. This test tells the company, the following things about you: 1) How do you do in a stressed situation; 2) What is the code quality you write; 3) What you're trying to do first, functionality or beauty.

In the beginning a had no idea what should I do, so I found it quite complicated, but then after a bit of thinking this was quite easy .

Well yes in order to make it more animated I think this should have a different approach.