What I am trying to do can't be that difficult. I just can't seem to find the answer.

I have a purple box on the stage. I turned this box into a movie clip with the instance name of "purple." onEnterFrame, I want to increase the wdith of that box. It is currently 11.75px. I want it to ease into 40px. I want this to happen onEnterFrame.

I am using Actionscript 2.

Any ideas?