2ft Square , 5 Sided Black Box

About 1986 I had been a student in a junior college at a Lubbock annex , it was around 3:00 in the afternoon.
At the time I lived with my parents south of Lubbock about 4 miles out. A fairley populated residential area.
As I was driving home on County Road 1585 to turn South on South University Ave , I had notice from a mile away a BLACK object that looked like a kite.
As I got closer to my turn I noticed no one flying the "KITE" and once about 100 ft away I could see it to be a Black Box .
Out of curiosity I drove past University Ave and pulled the car over and got out.
There are power line along the road way, as I wathced this object I could see it had only 5 sides, I could see inside the BLACK box.
I observed this box as it floated a few feet over the power lines, decend , reverse direction and do a full circle of the power lines.
Keep in mind, I am directly under this object in broad daylight.
as the object reaccended it then resummed its coarse and continued in a southern direction with a gradual climb.
I rushed to the house to notify my mother but by the time i had gotten there , less than 1/2 mile away , the object was so high and far way she could only see a dot.
I was wondering if anyone else had ever reported seeing anything like this.
((name and e-address deleted))
Witness indicates that the date of the incident is approximate.  We have amended the time above to 15:00 hrs..  PD