i do agree with rmdawson, it would look much more professional if you A) didnt host at codepen, and B) hosted all of them in the same place, preferably C) either your own domain, or host them yourself.
think about it like this. if you were trying to pick a doctor to perform surgery on you would you rather pick the guy with the credentials from johns hopkins, standford, and columbia or the guy with certificates from learnsurgeryfree.com, freesurgerycamp.com, and surgeryacademy.com?
hosting them yourself is so easy nowadays. if you have just about any device thats always connected to the internet then you can have everything set up in less time than it would take to set up domain from godaddy.