What to do if you have a kitten with a dead mother?

If I were you I would go to a veterinarian to get advice. But if you can't soon enough I would try to give him/her milk from a bottle, (when their kittens they usually can't see until older). And try your best until your able to go to the vet.**also i would try to keep him/her very warm because she/he is used to the heat from its mother**