Donate Your Car Sacramento

last night I was coming home from Sacramento going south on highway 99, outside of Madera on avenue 7 just about a two miles from Herndon ave exit there was a these bright white lights shining from the NE behind me. At first I thought it was car high beaming me, but as I look back the car was a little ways away… I looked at the lights again and there were 4 distinct lights. 3 in a line and 1 on top. At first again I thought it was an airplane, but it was moving way too smoothly to be a plane plus it didnt have any blue or red lights that would indicate it was a plane, I thought it was going to crash, but then it flew off again. Funny thing I never seen a plane flew off so close from the ground before that easily. Whatever it was if freaked out my wife out as well. We tried piecing it together, but we still cant expalin what we saw. I know there was car behind me as well, may he/she saw something, but man it was freaky. it happened just abour 10:50pm anyone saw anything? fill me in.