Hello and welcome to BYC! Glad you joined.
You should post these pictures on the What Breed or Gender is This? Forum that @Pork Pie provided.
Good luck with your chicks!
The two black ones with spots on their head could be either barred rock (yellow /with possibly black feet) or Possibly Cuckoo Maran (pink with black). Can’t make out the real read one. The little orange on could be a Gold/Red Sex link. Hard to tell though. You’ll know better in a few weeks.