White light moving up, down, sideways then disappeared.

It was a beautiful, clear, fairly still night in Manzanita so 4 friends and I decided to turn off all the lights on my beach house deck and watch the Perseid meteor shower. We’d been sitting for an hour or so gazing at meteors, satellites and an occasional plane pass over when I gazed to the East/slightly SE about 1/3-1/2 above the horizon at a group of stars (I don’t know much about astronomy so I don’t know what stars they were) and saw a small white/silver pinpoint of light, not much bigger or brighter than a star, suddenly appear moving in that area. At first I thought it was a star but it started moving erratically, although rather slowly, up, down, sideways, back and forth. The nearby stars it was moving around stayed stationary so it was obviously not a star. I have no idea how far away it was or how fast it was moving. 2 of my friends also saw this light and while this was happening we talked and agreed this was not looking like an airplane or helicopter and was definitely not a satellite or a meteor. And then it just disappeared. I stayed out and watched for another hour, and though the meteor shower increased, I didn’t see anymore strangely moving lights.