Hello and Welcome To BYC! Congratulations on your new chicks! They are still really young to tell for sure since a lot of breeds look alike as chicks, but if you can get some good clear pictures of them, you can try posting them on the What Breed Or Gender Is This forum for help with trying to figure out their identities https://www.backyardchickens.com/f/15/what-breed-or-gender-is-this
I am not really good at chick ID's so I can't help you much there. But there will be other members come here to welcome you to BYC today that will probably know.
BUT..if you just can't wait that long, LOL, you can post this pic in our What Breed section of the forums for some quick breed ID's....
A little more information would be helpful. Close up photo's of each chick. Where did you get them from? Any information you received about the chicks? Are they bantams?