You'll need to set up the gx package manager. If you don't know how to do that, don't worry. Hang tight and read the upcoming blog post.
In your 1st terminal go run main.go -secio -l 10000
Follow the instructions in your 1st terminal and copy and paste the given command into your 2nd terminal e.g. go run main.go -l 10001 -d /ip4/127.0.0.1/tcp/10000/ipfs/QmZ8NayvdXc2U2A1cwh9qGaHK7uxXXVrZQEYwDqbfFydfj -secio
Follow the instructions in your 2nd terminal and copy and paste the given command into your 3rd terminal e.g. go run main.go -l 10002 -d /ip4/127.0.0.1/tcp/10001/ipfs/QmRAj9JJVKRJmWHbDKzvzKDVVFPWxuWYio3bPym4SgGPgF -secio
Type a BPM into any of your terminals and watch your blockchain be broadcast to all terminals!