Problem
You need to change properties of your MovieClip, like alpha and position.
Solution
Using dot syntax you have access to all public properties in your MovieClip.
Detailed explanation
Please create any movie clip on your stage and, in the Properties panel, name it “my_mc.”
Next, in the Actions panel enter the following code:
my_mc.x=0;
my_mc.y=0;
my_mc.alpha=.40;
Source:
display objects