ROUND ,SPHERICAL ,TRIANGLES INSIDE OR AROUND IT WITH A SHUTTER ,;CHANGES COLORS

the object was round and followed me for about 15 miles or what it seemed. the object was round and inside it had triangular shapes going toward the center. then at the center was a shutter shape opening ond closing slowly, in no absolute hurry.  
i was accually farther than 15 mile , at the time,but didnt realize, i can remember again more than 100 mile ,but my odometer only had 15 miles put on it i know this because i turned around to get back to the rest area but found it was a long way away i cannot remember going that far it was late when all this happend, but when this was over i was in day light and along ways away from where i encountered the object my motor cycle light went on and off like i was turning the key on and off [ by the way I AM NOT MAKING THIS UP this happened along time ago but I KNOW THIS HAPPENED  as far as i can tell !!!!!!!!thank you
Date of incident may be approximate, although the witness does not indicate that fact.  PD