Scale MC with easing!

Need some AS help here! :elderly:

I want to scale a MC! Like this:

on (press) {
	MyMC._xscale = 200;
	MyMC._yscale = 200;
}

But how do I get it to scale with ease? :sigh:

//MyMC:
onClipEvent(load){
target_scale = _xscale
}
onClipEvent(enterFrame){
_xscale = _yscale += (target_scale - _xscale)/10
}
// button:
on (press) {
MyMC.target_scale = 200;
}

:beam: THX alot m8!