Pulsing Light that made extreme turns and changes in speed.

Was on back porch having cigarette and letting dog out.  Very clear sky this morning, Selfridge Air Base is nearby to east.  Detroit Metro Airport traffic usually travels from North West to South.
This bright object caught my eye as it was “Lit” for a long duration (5-8 seconds) vs. “normal aircraft” constant blink.  The light was white only and would slowly fade out and light again in random patterns and be very faint in between.  Pulse would be better description than blinking.
It started coming from West towards me (East) made various quick slight changes of direction (not following typical air traffic of Selfridge or Detroit Metro traffic) would say at first I thought perhaps a plane in distress.  Than pulsed bright again only to fade out and move quick and suddenly towards South East.  Was faint again for 15-20 seconds than pulsed again in a direct South and became faint and watched object travel extremely fast continuing in same Southern direction.
The speed always was faster than normal jets from Selfridge would slow for moments still faster than normal jet. At the end when it moved “extremely fast” I would compare to shooting star speed.
I did a hand sketch of flight pattern which I will email (in pdf form).