Button scale with AS

programming flash
1

Hi, I have a button, I want the button to get 50% bigger when rollOver

I have this code in the button, can some one help me? this simple code just turns the btn from white to red in the rollOver

on(rollOver){
myColor = new Color(button01);
myColor.setRGB(0xFF0000);
}
on(rollOut){
myColor = new Color(button01);
myColor.setRGB(0xFFFFFF);
}
on(press){
myColor = new Color(button01);
myColor.setRGB(0xFFffff);
}
on(release){
myColor = new Color(button01);
myColor.setRGB(0xFF0000);
}