I saw 3 orange fireballs in triangle formation. A fourth was also noted, but not part of the triangle. These were extremely low to ground. In relation to full moon the fireballs witnessed would be approximately less than 1/4 of moon in size. I witnessed them for approximately 20 seconds. They did not make any sound. These fireballs blinked off twice. The second time they blinked off they did not return. These fireballs did not move while we witnessed them. Just hovered. We were in the car during the sighting, facing south. The lights were observed over pasture to our left. This sighting was in a very rural area of Oklahoma. I was unable to get images. I have submitted this report to the National UFO Reporting center as well. 1. We were driving home. 2&3. I noticed the fireballs through treetops first & thought looked like house lights, then realized there is no way they could be houselights. 4. See narrative above. 5. Amazed. I wanted to get video but was not successful. 6. Fireballs just blinked out. Then gone?