Drop correct trigger and returning object to starting piont

Hello all,

Here is my challenge.  I have four layers being triggered by dropping a shape onto another shape.  Each layer has its own drop shape, but they are all being dropped on the same trigger shape. 

What I'm trying to figure out is if i can do this without converting it to freeform.

in the end i want the first trigger shape to return to its home position when the second trigger shape is dropped on.

thanks all.