I saw 3 lights in the sky that moved together.

I was in the street in front of our home.  I was not alone but not near anyone to let them know.  What I saw was 3 lights that looked like dim stars.  But these 3 lights formed a triangle, 1 light in front and 2 to rear.  And the lights moved together.  
I watched it move in a north direction, and then it turn to the west.  Almost in a 45 degree.  All lights turned at same time.  I remember it heading toward downtown Houston.  The light appeared to be high in the sky.
I realize this is old and not important, but I wanted to let you know.  
I could not see a craft but saw lights that moved in a uniform pattern.
Witness indicates that the date of the sighting is approximate.  PD