Brighter than stars light that would move left and right while dropping behind treeline after few hours

Really bright light almost every night the last couple of months. This light will move from what appears to be left to right, and every 3-5 minutes appears to fall a bit. Then will stop and dance again from left to right untill it finally disappears behind the tree line. It looks as if it may be changing colors, and so much bigger and brighter than all other stars. Looks nothing like satellites mentioned. Moves to erratically. In the past, you would see 2 of them. But it is now only 1. Does anyone know what this is that I am seeing?