Orange orb hovering over Bay Area. Another appears and approaches, and hovers then dissapears. .Moves upand down , dims in/out

Last night I saw a bright orange orb hovering in the sky. I was standing on my back porch which is 1 story off the ground. I live in the center-most area of my city (Oakland, Ca) and according to Google satellite my street is 400 ft elevated (I live on a hill).  The orb looked as if it was roughly between 10 and 20 thousand feet off the ground,. I was standing on top of a chair, and with doing so it looked like it was in my direct line of sight, but way across town (I was facing NW).  It seemed to be getting brighter then it would dim out then come back, and it was moving up and down very slowly, then it would stay it one spot. The size of it was small compared to the moon, but large compared to a star.  I saw another orb appear that was not bright as the first, and it slowly drifted towards the first orb making its way directly on top of it.  It then stayed then and got very bright, so bright that they almost looked like one.  The second orb then dimmed out )but! still visible) about a minute later and drifted away in the same direction it was going and disappeared (it went in a straight line).  I zoomed in with my camera and the shape of the object looks like a geometric Pac-man shape.  The original orb stayed in the sky for about 20 minutes (that I saw of it that is)  periodically dimming out then getting bright again. Eventually it drifted slowly away and disappeared.