sphere? with connected orbiting strobe which changed colors. No sound

Shape was unknown, for I could not see the "body" of it.  I beleive it was round like a ball.  It had one light, which was connected to this body (which I couldn't see) which orbited around the body in no apparent pattern, and changed colors each time it orbited the body.  The object itself was slowly moving from south-west to northwest, stopped and sort of hovered in one place for about three seconds, then at a very high rate of speed darted in a "z" shaped pattern-first to the east, then to the southwest (while darting way up in altitude), then west while darting out of sight towards space to the west of my position.  If you can picture a sphere, with a connecting yet orbiting light that changed colors and flashing frequency (the orbiting light part) thats the closest way I can describe it.  When this thing darted, it was un-beleivably fast!  No sound at all either.
Date is approximate.  PD