I need to write a small shell script which does the following :

I have a file : root/var/log/ocmp/ocmpclient.log

This is a log file which is continuosly getting updated . I have to keep looking into this file all the time. I have to look for four keywords, "File Detected", File Sending", "File Recieved", "Disconnecting"

Now whenever i find one of these keywords i have to print them on the screen, this process continues till the computer shuts down.

Pls help me, I am supposed to use grep and awk

Help me its urgent.