Bright Orange Light Balls that formed a "V" before we lost sight of themSunday night, July 5th, 2015, we were heading north on Highway 23 through Oscoda toward Harrisville. My son & I pulled over into a parking lot, somewhere between 10 & 10:30 P.M., to watch the last of fireworks we could see going off over Lake Huron. While watching fireworks, we noticed a bright light/orange ball in the sky, heading toward us & northward, going very steady, not too fast, but parallel along Hwy 23 (it was basically between us in the parking lot, & the road, as it went over/past us). We had our windows rolled down, & though there were some fireworks noise, we didn't hear any noise from this orange object, though it went over/past us.After the fireworks ended, we got back on Hwy 23 heading north. In about 5 miles, suddenly the orange glowing ball came from the east (which was Lake Huron side), & crossed the road ahead of us, flying west. Then, two more came across, closer together. A fourth one was back some distance, following the other 3. We didn't see what the first ball did, but the 2nd & 3rd, after crossing the Highway a short distance, & where we could still see them above the trees, started to slow & then hover. They waited until the 4th orange ball caught up & joined them. The number 2 orange ball was in front, number 3 on the right, & number 4 took up the left side, so they formed a “V” & then they continued by going northwest.We had pulled over on the shoulder, & had our windows rolled down some. NO noise was heard, & also, all of these flying orange light balls did a bit of pulsing in brightness, getting a bit brighter & then dimmer as they went along. There were NO red, green or white lights whatsoever, nor any blinking lights.We would love to know what these things are; if top secret military I guess we won't ever be told, but we'd love to have an answer as to what looks like these for night flying & can do this sort of thing. Couldn't be planes, balloons, or helicopters (would have heard the noise on those).