Automatic replication of code from 1 Linux VM to another under Load Balancer in Azure

I have 2 VMs in Azure which run under an Internet Facing Load Balancer. Currently,I have to deploy my code manually to both the VMs,in order to keep them in synchronisation. I need to automate this process,in such a way,that whenever I deploy my code to 1 VM,it should automatically get copied to another machine or machines,which are under the same Load balancer. Please help.