a question about taskexecuter

HI,
I maked a mode that i want the task executer to carry the products,on load and on unload ,the task executer should rise or descend it's top part to put the product up or down before it's traveling or it's leaving.in such way, the task executer can load or unload the product .In order to realize this,I write some simple kinematics codes,but in the unload part,the product leaves the executer before the unload trigger fires these codes.now I don't know where i should put these codes .How can I realize these actions
Thanks!

Wouldn´t this be solved by using the Animation Creator?