Elixir Functional Programming, Toy_Robot

I have just read JOY OF ELIXIR book and apart from it I have no previous experience in this. Actually I have participated in a competition where we have to make a robot(toy_robot),we have been provided a few articles . It includes making functions like start, stop, move, left, right etc. But as I am very new to functional programming and elixir, I am not able to properly understand it and make functions. Can someone please share any resources for understanding it properly, and keeping in mind I have only 8 days to read the resources.