Rapid erratic motion of a 'star'-like light, ending with trenmendous speed over the horizon.

This to replace my previous posting which somehow got messed up. Two of us watched as a 'star' began to move erratically, first in one direction, then another, then would stop, then move again, in a small pattern of triangular motion. After a few minutes of this activity, the light moved away quickly, accelerating at enormous speed and disappeared over the horizon. The entire event was maybe four minutes.
Date of incident may be approximate.  PD