SPOILER ALERT: If you click on 
Check the top-right for a "fork" button.
- Open Terminal
git clone git@github.com:<YOUR_USERNAME_HERE>/meme-maker-example.gitcd meme-maker-example./SERVER
Open your browser and go to http://localhost:8000
- Download http://www.sublimetext.com/
- Run it & open up
app.jsandindex.html.
Checking out a working example will be crucial. There's one here: http://rafflecopter.github.io/meme-maker-example/
WARNING - SPOILER ALERT: the source code on that page is the filled-in version of yours, so it contains spoilers.