Blob Tracking

Robotic program. I need a small program written in VBScript to work with Roborealm and track a color. Similar to this program:(<[login to view URL]>) I need the program to allow the motor (ie robot) to turn left and right and track a color via webcam. I'd like a smooth motion and the motor should stop if it loses the color and wait until it picks it back up before moving again.