Petrol pump example from (Mannings' FRP book](https://livebook.manning.com/#!/book/functional-reactive-programming/about-this-book/).
Implemented up to the PoS clearance part.
$ npm install
$ npm start
Petrol pump example from (Mannings' FRP book](https://livebook.manning.com/#!/book/functional-reactive-programming/about-this-book/).
Implemented up to the PoS clearance part.
$ npm install
$ npm start