MySQL replication

Hi all,

I've to develop a system of database under MySQL.
Each PC which works, reads and writes in a database.
I'd like a single database where all data of all PC is stored.
This database could be on a server, but if the server or the network
crashes, all the PC will be blocked (and it's not possible).

So I'd like to know if i can use replication functionality. If I have
3 PC (A, B and C) and a server, the replication could work like that A-
>B->C->Server->A.

I'm not an expert of database and MySQL. So Is it possible to process
like that ?

Many thanks in advance for your help.