When you type then enter, it will seem as if the project has stopped. But it hasn't. It still knows what you are typing so just click on the second bar after you are finished typing in the first. When you are finished typing in both bars, click on the "Consult StarClan" button to receive your warrior name.
There are actually over 40 different warrior names you can have depending on your name! If you're wondering how it works, just look inside the scripts! I got this idea from www.warriorcats.com when I figured out how their warrior cat name creator worked. All I really have to say now is have fun!