Why is There No Power?

I have a 1982 Honda Nighthawk. I have just put a new battery on it and there is no electricity anywhere. It started a couple of times then the headlight went out, but was still running. Then I was only getting power to the tail light and blinkers. Then there was nothing. So I put the new battery in and still have nothing. What could be the problem? There are no loose connections that I could find. Any help would be appreciated Gr8ly!!!

Thank you!!

Kenny