Form questions in slides: How do I replicate this functionality?

Hi guys,
Anyone know how I could build a form into multiple slides like so:
http://howmuchdoesawebsiteco.st/

It does not need to do any calculations. It is just a contact form with each question on its own slide.

So
slide 1:
first question

slide 2:
another question

Slide 3:
Last question + Send.