if (statement) question

[chrisago]

Hi there.


I am trying to change the alpha of a movie clip using if statement.
I have done this but i want to change the alpha using a fade in way.
e.g. From 100% fade to 0% using a motion tween.

I am wondering if you can do such an effect using only actionsript!

In the example i have created some movie clips turning off & on their alpha, but i didn't manage to do it using any fade effect.

Please see the fla. attachment

thanks.