ask for some work man. Your idleness shows your unethusiasm which is going to haunt you down the road. Just ask for some work rather than just sitting idle. They will assign you at least some task and will let you know if they do not have anything for you if they don't have. thanks.

DO NOT JUST SIT IDLE. ASK FOR SOMETHING. THIS (IN MY OPINION) SHOWS YOU THAT YOU ARE A ROOKIE.