Bright orange lights

My husband and I were outside at 9:20 and observed 6 bright glowing orange lights moving very slowly and without any sound across the sky.  The lights glowed orange but there was no flashing as you would expect with an airplane.  They were initially in 2 triangle shaped patterns.  Then one completely disappeared.  Next the remaining lights began to move more quickly and 2 lights approached each other appearing as if they were touching. Then the lights were obscured by a tree.  We ran out to the street to see around the tree but all of the lights had disappeared.  We searched the sky for several minutes but did not see the lights.  My husband was taking a video with his phone but when we tried to look at the video, nothing had been recorded.
Witness elects to remain totally anonymous; provides no contact information.  PD