Button to control MC coordinates

Imagine i have a button and on (press) I want a specific movieclip to change position. This is what I’d use:

on (press) {
myclipMC._y = 50;
myclipMC._x = 100;
}

But what I really want is the movieclip to move smoothly into the new position. How would I alter the code for this. Evidently I’d have more buttons and each one would move the clip into a new position.

And what can I do if I wanted to try to move the clip into it’s new position using motion blur? (That might be cool)

So I ask for your help, please.