Actionscript 3.0 :: Additional Functionality Upon Each Button Click?

Trying to code one button to preform different functions upon each additional click.

First click: you get a tree full size Second click of this same button: you get an additional tree 50 size in a new location Third click of this same button: you get another tree 25% of the size of the first tree and in a new location.

The way it works now is the 2 smaller trees come up when the movie runs and the third appears on the button click.

Here is the code: (CS4 on a MAC) .fla attached.

/* AS3
Copyright 2008 __MyCompanyName__.
*/
package

[Code]....