Nexus is a robotics competition held at Techfest every year. The winners can go on to participate in the International Robotics Challenge.
Your bot for this competition would mainly have to solve a maze ( it has to be a line follower bot) and pick up and place blocks from one place to another.
The competition is held zone wise. It will be held on the 25th of September for the west zone.
If you have any doubts , you can come to SRA and ask for help.
Visit http://www.techfest.org/home/event/nexus for details.