^This codepen, which is the example project, no longer load quotes properly. And I am not able to get the API to work on my own pen, either.
Mine is still working, https://codepen.io/cachin/pen/wjKdzY
I see that in the example you linked, they are not using the same API I used when I did this project, go here for the api:
http://forismatic.com/en/api/