To Include an Existing Script in the Open Script

In the Animation Producer dialog, choose File > Include Script.
The Include Script dialog opens.
In the File drop-down menu, select the DGN file in which the required script file is located. This may be the active DGN file or a reference.
In the scripts list box, select the required script file.
(Optional) Enter values for: the Start Time, Repeat Count, and/or Scale, as required.
Start Time: the frame/time at which you want the script to start.

Repeat Count: the number of times that the script is to be repeated in the animation.

Scale: the scale factor to apply to the script.
Click OK.
The Include Script dialog closes, and the script entry is added to the list in the Animation Producer dialog.