Make a comp-sized solid.
Use the various mask tools to make a mask to define your motion path.
Copy the mask, select a shape, and then paste into the shape's POSITION property. You'll get a 2-second animation of the path, whose timing you can adjust.
Copy this position animation, and paste it into the other shapes' position property.
Move the keyframes on each shape layer, staggering them as necessary so they follow one another.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA