At around 2:40 p.m., we noticed a helicopter flying over house. Once it left the vicinity, we noticed a light hovering a above our house in Vallejo, California. We saw a tripod-shaped, lighted craft hovering above our house. 2 white lights on the top, 1 amber change to purple light on the bottom, blinking brightly sequence, Not familiar with helicopter or aircraft. It hovered for about 10 minutes, with blinking lights, as described above then drifted to the West and Rose into the atmosphere, until we couldn't see it anymore.