How to grow coral by yourselves?

I always visit Thai sea to see my beloved coral. One of those times, I had a chance to grow coral.

1. Prepare the PVC tube, Snokering????? and small screw
2. Go to pick a living coral in the sea. (Only for the coral in antler shape)
3. Break it to be smaller pieces.
4. Put each pieces in PVC tube and screw it. (Please do 3-4 very quickly.)
5. Turn the coral into the sea as fast as you can.