Two undulating or "playful" fireballs

I live near aviation traffic, but I love that because I have been an aviation fan since I was a kid. I mention this because even though I live under the approach/departure patterns for both KBFI and KSEA and love plane spotting, but what I saw were absolutely not planes. At first I thought they were, because they were flying together and I thought that was a bit odd, but could be two Blue Angels or other fighters doing something, but it soon became apparent they weren't that either. There was absolutely no sound. It is absolutely impossible for those two fireballs to be aircraft. The color of what would have been landing lights were more orange/amber than an aircraft and as they got closer, the "aura" around them was just odd. Another characteristic was that as the flew from past me from north (or perhaps northeast, I can't remember exactly) they started dipping and diving like they were playing with each other and seemed to undulate crossing each other kind of like a double helix pattern, but then got closer and closer to each other in little small skips or bumps, but smoothly.
All this happened within just a couple of minutes, half of which was spent trying to to process what I was seeing and the other half in amazement, leaving no time for a photo, so I know the attached photo is horrible because my phone lens was dirty, it was night and I was a bit nervous and trembling, but this was what I captured before the two flew off to the south. I'm also attaching a phot of the background after they left and I was more stable. Lens was still dirty though.