Adding actions to duplicated MC's?

Im trying to duplicate a movieclip, that is trailing to my mouse (only on the _x axis). Now I want to duplicate that movieclip several times and making the duplicates follow the first movieclip, but with a _x difference between them (lineair steps).

Now I can get the first movieclip to follow the mouse on the _x axis, and I can get to duplicate it several times, but I get stuck when trying to add the actions to the ones I’ve duplicated…

Any ideas? :-\