satellite?

Hi, I keep seeing from sc right at sundown to 30 min after sundown a bright light between venus and jupiter..it disappers 30 min after sundown...do i dragged out my telescope and looked at it. Its very bright and has a revolving point of light making the same moves over and over 8O ..far to the west then shorter southwest at a perfect 90..i was just wondering what i was looking at. Thanks..Larry :S