Flash CS3 Tutorial
How to Duplicate and Distribute Flash Objects
The Distributed Duplicate command creates multiple copies of your object and changes its parameters (i.e., scale, color and alpha) over time.
Add a rectangular object to the workspace with the Rectangle tool (r key).
With the rectangle selected, choose Insert > Timeline Effects > Assistants > Distributed Duplicate.
In the dialog box, input values for the Number of Copies, Offset Distance, Rotation and Start Frame.
Click the Update Preview button to see the changes.
You can also adjust the Scale, Color and Alpha settings.
Once you are satisfied, click OK. A new distributed object is added to the workspace.